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<!doctype html><html lang="en"><head><meta charset="utf-8"><title>Use the app size tool | Flutter</title><link rel="icon" href="/assets/images/branding/flutter/icon/64.png" eleventy:ignore><link rel="apple-touch-icon" href="/assets/images/branding/flutter/logo/flutter-logomark-320px.png" eleventy:ignore><meta name="viewport" content="width=device-width,initial-scale=1"><meta name="theme-color" content="#ffffff"><link rel="preconnect" href="https://fonts.googleapis.com"><link rel="preconnect" href="https://fonts.gstatic.com" crossorigin><meta name="google-site-verification" content="HFqxhSbf9YA_0rBglNLzDiWnrHiK_w4cqDh2YD2GEY4"><script>!function(e,t,a,n){e[n]=e[n]||[],e[n].push({"gtm.start":(new Date).getTime(),event:"gtm.js"});var 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collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-5-3" href="#header-sidenav-5-3" role="button" aria-expanded="false" aria-controls="header-sidenav-5-3">Games</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-5-3"><li class="nav-item"><a class="nav-link" href="/resources/games-toolkit">Overview</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/games/achievements-leaderboard">Add achievements and leaderboards</a></li><li class="nav-item"><a class="nav-link" href="https://firebase.google.com/codelabs/build-leaderboards-with-firestore#0" target="_blank" rel="noopener">Build leaderboards with Firestore</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/plugins/google-mobile-ads">Add advertising</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/games/firestore-multiplayer">Add multiplayer support</a></li><li class="nav-item"><a class="nav-link" 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id="header-sidenav-5-4"><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-5-4-1" href="#header-sidenav-5-4-1" role="button" aria-expanded="false" aria-controls="header-sidenav-5-4-1">Advertising</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-5-4-1"><li class="nav-item"><a class="nav-link" href="/resources/ads-overview">Ads overview</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/plugins/google-mobile-ads">Add advertising</a></li><li class="nav-item"><a class="nav-link" href="https://codelabs.developers.google.com/codelabs/admob-ads-in-flutter" target="_blank" rel="noopener">Add AdMob ads to your Flutter app</a></li><li class="nav-item"><a class="nav-link" href="https://codelabs.developers.google.com/codelabs/admob-inline-ads-in-flutter" target="_blank" rel="noopener">Add an AdMob banner and native inline ads</a></li><li class="nav-item"><a class="nav-link" href="https://developers.google.com/admob/flutter/mediation" target="_blank" rel="noopener">Google AdMob mediation</a></li><li class="nav-item"><a class="nav-link" href="https://pub.dev/packages/interactive_media_ads" target="_blank" rel="noopener">Interactive Media Ads SDK</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-5-4-2" href="#header-sidenav-5-4-2" role="button" aria-expanded="false" aria-controls="header-sidenav-5-4-2">In-app purchases</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-5-4-2"><li class="nav-item"><a class="nav-link" href="/resources/in-app-purchases-overview">In-app purchases overview</a></li><li class="nav-item"><a class="nav-link" href="https://codelabs.developers.google.com/codelabs/flutter-in-app-purchases" target="_blank" rel="noopener">Add in-app purchases</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-5-4-3" href="#header-sidenav-5-4-3" role="button" aria-expanded="false" aria-controls="header-sidenav-5-4-3">Payments</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-5-4-3"><li class="nav-item"><a class="nav-link" href="/resources/payments-overview">Payments overview</a></li><li class="nav-item"><a class="nav-link" href="https://pub.dev/packages/pay" target="_blank" rel="noopener">Google pay package</a></li></ul></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-5-5" href="#header-sidenav-5-5" role="button" aria-expanded="false" aria-controls="header-sidenav-5-5">Maps</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-5-5"><li class="nav-item"><a class="nav-link" href="https://codelabs.developers.google.com/codelabs/google-maps-in-flutter" target="_blank" rel="noopener">Add Google maps to a Flutter app</a></li><li class="nav-item"><a class="nav-link" href="https://developers.google.com/maps/flutter-package" target="_blank" rel="noopener">Google Maps package</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-5-6" href="#header-sidenav-5-6" role="button" aria-expanded="false" aria-controls="header-sidenav-5-6">News</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-5-6"><li class="nav-item"><a class="nav-link" href="/resources/news-toolkit">Build a news app</a></li></ul></li></ul></li><li aria-hidden="true"><div class="sidebar-primary-divider"></div></li><li class="nav-header">User interface</li><li class="nav-item"><a class="nav-link" href="/ui">Introduction</a></li><li class="nav-item"><a class="nav-link" href="/ui/widgets">Widget catalog</a></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#header-sidenav-10" role="button" aria-expanded="false" aria-controls="header-sidenav-10">Layout</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-10"><li class="nav-item"><a class="nav-link" href="/ui/layout">Introduction</a></li><li class="nav-item"><a class="nav-link" href="/ui/layout/tutorial">Build a layout</a></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-10-3" href="/ui/layout/lists" role="button" aria-expanded="false" aria-controls="header-sidenav-10-3">Lists & grids</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-10-3"><li class="nav-item"><a class="nav-link" href="/cookbook/lists/basic-list">Create and use lists</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/lists/horizontal-list">Create a horizontal list</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/lists/grid-lists">Create a grid view</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/lists/mixed-list">Create lists with different types of items</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/lists/spaced-items">Create lists with spaced items</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/lists/long-lists">Work with long lists</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-10-4" href="/ui/layout/scrolling" role="button" aria-expanded="false" aria-controls="header-sidenav-10-4">Scrolling</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-10-4"><li class="nav-item"><a class="nav-link" href="/ui/layout/scrolling">Overview</a></li><li class="nav-item"><a class="nav-link" href="/ui/layout/scrolling/slivers">Use slivers to achieve fancy scrolling</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/lists/floating-app-bar">Place a floating app bar above a list</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/effects/parallax-scrolling">Create a scrolling parallax effect</a></li></ul></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#header-sidenav-11" role="button" aria-expanded="false" aria-controls="header-sidenav-11">Adaptive & responsive design</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-11"><li class="nav-item"><a class="nav-link" href="/ui/adaptive-responsive">Overview</a></li><li class="nav-item"><a class="nav-link" href="/ui/adaptive-responsive/general">General approach</a></li><li class="nav-item"><a class="nav-link" href="/ui/adaptive-responsive/safearea-mediaquery">SafeArea & MediaQuery</a></li><li class="nav-item"><a class="nav-link" href="/ui/adaptive-responsive/large-screens">Large screens & foldables</a></li><li class="nav-item"><a class="nav-link" href="/ui/adaptive-responsive/input">User input & accessibility</a></li><li class="nav-item"><a class="nav-link" href="/ui/adaptive-responsive/capabilities">Capabilities & policies</a></li><li class="nav-item"><a class="nav-link" href="/ui/adaptive-responsive/best-practices">Best practices</a></li><li class="nav-item"><a class="nav-link" href="/ui/adaptive-responsive/more-info">Additional resources</a></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#header-sidenav-12" role="button" aria-expanded="false" aria-controls="header-sidenav-12">Design & theming</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-12"><li class="nav-item"><a class="nav-link" href="/cookbook/design/themes">Share styles with themes</a></li><li class="nav-item"><a class="nav-link" href="/ui/design/material">Material design</a></li><li class="nav-item"><a class="nav-link" href="/release/breaking-changes/material-3-migration">Migrate to Material 3</a></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-12-4" href="/ui/design/text" role="button" aria-expanded="false" aria-controls="header-sidenav-12-4">Text</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-12-4"><li class="nav-item"><a class="nav-link" href="/ui/design/text/typography">Fonts & typography</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/design/fonts">Use a custom font</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/design/package-fonts">Export fonts from a package</a></li><li class="nav-item"><a class="nav-link" href="https://pub.dev/packages/google_fonts" target="_blank" rel="noopener">Google Fonts package</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-12-5" href="/ui/design/graphics" role="button" aria-expanded="false" aria-controls="header-sidenav-12-5">Custom graphics</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-12-5"><li class="nav-item"><a class="nav-link" href="/ui/design/graphics/fragment-shaders">Use custom fragment shaders</a></li></ul></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#header-sidenav-13" role="button" aria-expanded="false" aria-controls="header-sidenav-13">Interactivity</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-13"><li class="nav-item"><a class="nav-link" href="/ui/interactivity">Add interactivity to your app</a></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-13-2" href="/ui/interactivity/gestures" role="button" aria-expanded="false" aria-controls="header-sidenav-13-2">Gestures</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-13-2"><li class="nav-item"><a class="nav-link" href="/ui/interactivity/gestures">Introduction</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/gestures/handling-taps">Handle taps</a></li><li class="nav-item"><a class="nav-link" href="/ui/interactivity/gestures/drag-outside">Drag an object outside an app</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/effects/drag-a-widget">Drag a UI element within an app</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/gestures/ripples">Add Material touch ripples</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/gestures/dismissible">Implement swipe to dismiss</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-13-3" href="/ui/interactivity/input" role="button" aria-expanded="false" aria-controls="header-sidenav-13-3">Input & forms</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-13-3"><li class="nav-item"><a class="nav-link" href="/cookbook/forms/text-input">Create and style a text field</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/forms/retrieve-input">Retrieve the value of a text field</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/forms/text-field-changes">Handle changes to a text field</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/forms/focus">Manage focus in text fields</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/forms/validation">Build a form with validation</a></li></ul></li><li class="nav-item"><a class="nav-link" href="/cookbook/design/snackbars">Display a snackbar</a></li><li class="nav-item"><a class="nav-link" href="/ui/interactivity/actions-and-shortcuts">Implement actions & shortcuts</a></li><li class="nav-item"><a class="nav-link" href="/ui/interactivity/focus">Manage keyboard focus</a></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#header-sidenav-14" role="button" aria-expanded="false" aria-controls="header-sidenav-14">Assets & media</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-14"><li class="nav-item"><a class="nav-link" href="/ui/assets/assets-and-images">Add assets and images</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/images/network-image">Display images from the internet</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/images/fading-in-images">Fade in images with a placeholder</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/plugins/play-video">Play and pause a video</a></li><li class="nav-item"><a class="nav-link" href="/ui/assets/asset-transformation">Transform assets at build time</a></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#header-sidenav-15" role="button" aria-expanded="false" aria-controls="header-sidenav-15">Navigation & routing</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-15"><li class="nav-item"><a class="nav-link" href="/ui/navigation">Overview</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/design/tabs">Add tabs to your app</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/navigation/navigation-basics">Navigate to a new screen and back</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/navigation/passing-data">Send data to a new screen</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/navigation/returning-data">Return data from a screen</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/design/drawer">Add a drawer to a screen</a></li><li class="nav-item"><a class="nav-link" href="/ui/navigation/deep-linking">Set up deep linking</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/navigation/set-up-app-links">Set up app links for Android</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/navigation/set-up-universal-links">Set up universal links for iOS</a></li><li class="nav-item"><a class="nav-link" href="/ui/navigation/url-strategies">Configure web URL strategies</a></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#header-sidenav-16" role="button" aria-expanded="false" aria-controls="header-sidenav-16">Animations & transitions</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-16"><li class="nav-item"><a class="nav-link" href="/ui/animations">Introduction</a></li><li class="nav-item"><a class="nav-link" href="/ui/animations/tutorial">Tutorial</a></li><li class="nav-item"><a class="nav-link" href="/ui/animations/implicit-animations">Implicit animations</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/animation/animated-container">Animate the properties of a container</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/animation/opacity-animation">Fade a widget in and out</a></li><li class="nav-item"><a class="nav-link" href="/ui/animations/hero-animations">Hero animations</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/animation/page-route-animation">Animate a page route transition</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/animation/physics-simulation">Animate using a physics simulation</a></li><li class="nav-item"><a class="nav-link" href="/ui/animations/staggered-animations">Staggered animations</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/effects/staggered-menu-animation">Create a staggered menu animation</a></li><li class="nav-item"><a class="nav-link" href="/ui/animations/overview">API overview</a></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#header-sidenav-17" role="button" aria-expanded="false" aria-controls="header-sidenav-17">Accessibility & internationalization</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-17"><li class="nav-item"><a class="nav-link" href="/ui/accessibility-and-internationalization/accessibility">Accessibility</a></li><li class="nav-item"><a class="nav-link" href="/ui/accessibility-and-internationalization/internationalization">Internationalization</a></li></ul></li><li aria-hidden="true"><div class="sidebar-primary-divider"></div></li><li class="nav-header">Beyond UI</li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#header-sidenav-20" role="button" aria-expanded="false" aria-controls="header-sidenav-20">Data & backend</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-20"><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-20-1" href="/data-and-backend/state-mgmt" role="button" aria-expanded="false" aria-controls="header-sidenav-20-1">State management</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-20-1"><li class="nav-item"><a class="nav-link" href="/data-and-backend/state-mgmt/intro">Introduction</a></li><li class="nav-item"><a class="nav-link" href="/data-and-backend/state-mgmt/declarative">Think declaratively</a></li><li class="nav-item"><a class="nav-link" href="/data-and-backend/state-mgmt/ephemeral-vs-app">Ephemeral vs app state</a></li><li class="nav-item"><a class="nav-link" href="/data-and-backend/state-mgmt/simple">Simple app state management</a></li><li class="nav-item"><a class="nav-link" href="/data-and-backend/state-mgmt/options">Options</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-20-2" href="/data-and-backend/networking" role="button" aria-expanded="false" aria-controls="header-sidenav-20-2">Networking & http</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-20-2"><li class="nav-item"><a class="nav-link" href="/data-and-backend/networking">Overview</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/networking/fetch-data">Fetch data from the internet</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/networking/authenticated-requests">Make authenticated requests</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/networking/send-data">Send data to the internet</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/networking/update-data">Update data over the internet</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/networking/delete-data">Delete data on the internet</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/networking/web-sockets">Communicate with WebSockets</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-20-3" href="/data-and-backend/serialization" role="button" aria-expanded="false" aria-controls="header-sidenav-20-3">Serialization</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-20-3"><li class="nav-item"><a class="nav-link" href="/data-and-backend/serialization/json">JSON serialization</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/networking/background-parsing">Parse JSON in the background</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-20-4" href="/data-and-backend/persistence" role="button" aria-expanded="false" aria-controls="header-sidenav-20-4">Persistence</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-20-4"><li class="nav-item"><a class="nav-link" href="/cookbook/persistence/key-value">Store key-value data on disk</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/persistence/reading-writing-files">Read and write files</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/persistence/sqlite">Persist data with SQLite</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-20-5" href="/data-and-backend/firebase" role="button" aria-expanded="false" aria-controls="header-sidenav-20-5">Firebase</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-20-5"><li class="nav-item"><a class="nav-link" href="/data-and-backend/firebase">Overview</a></li><li class="nav-item"><a class="nav-link" href="https://firebase.google.com/docs/flutter/setup" target="_blank" rel="noopener">Add Firebase to your Flutter app</a></li></ul></li><li class="nav-item"><a class="nav-link" href="/data-and-backend/google-apis">Google APIs</a></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#header-sidenav-21" role="button" aria-expanded="false" aria-controls="header-sidenav-21">App architecture</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-21"><li class="nav-item"><a class="nav-link" href="/app-architecture">Introduction</a></li><li class="nav-item"><a class="nav-link" href="/app-architecture/concepts">Architecture concepts</a></li><li class="nav-item"><a class="nav-link" href="/app-architecture/guide">Guide to app architecture</a></li><li class="nav-item"><a class="nav-link" href="/app-architecture/recommendations">Recommendations</a></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-21-5" href="/cookbook/architecture" role="button" aria-expanded="false" aria-controls="header-sidenav-21-5">Design patterns</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-21-5"><li class="nav-item"><a class="nav-link" href="/cookbook/architecture/optimistic-state">Optimistic state</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/architecture/key-value-data">Persistent storage architecture: Key-value data</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/architecture/sql">Persistent storage architecture: SQL</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/architecture/offline-first">Offline-first</a></li></ul></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#header-sidenav-22" role="button" aria-expanded="false" aria-controls="header-sidenav-22">Platform integration</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-22"><li class="nav-item"><a class="nav-link" href="/reference/supported-platforms">Supported platforms</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/desktop">Build desktop apps with Flutter</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/platform-channels">Write platform-specific code</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/platform-adaptations">Automatic platform adaptations</a></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-22-5" href="/platform-integration/android" role="button" aria-expanded="false" aria-controls="header-sidenav-22-5">Android</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-22-5"><li class="nav-item"><a class="nav-link" href="/platform-integration/android/install-android">Add Android as build target</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/android/splash-screen">Add a splash screen</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/android/predictive-back">Add predictive back</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/android/c-interop">Bind to native code</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/android/platform-views">Host a native Android view</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/android/compose-activity">Launch a Jetpack Compose activity</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/android/restore-state-android">Restore state on Android</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/android/chromeos">Target ChromeOS with Android</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-22-6" href="/platform-integration/ios" role="button" aria-expanded="false" aria-controls="header-sidenav-22-6">iOS</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-22-6"><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/install-ios">Add iOS as build target</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/ios-latest">Flutter on latest iOS</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/apple-frameworks">Leverage Apple's system libraries</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/launch-screen">Add a launch screen</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/ios-app-clip">Add iOS App Clip support</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/app-extensions">Add iOS app extensions</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/c-interop">Bind to native code</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/platform-views">Host a native iOS view</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/ios-debugging">Enable debugging on iOS</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/restore-state-ios">Restore state on iOS</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-22-7" href="/platform-integration/linux" role="button" aria-expanded="false" aria-controls="header-sidenav-22-7">Linux</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-22-7"><li class="nav-item"><a class="nav-link" href="/platform-integration/linux/install-linux">Add Linux as build target</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/linux/building">Build a Linux app</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-22-8" href="/platform-integration/macos" role="button" aria-expanded="false" aria-controls="header-sidenav-22-8">macOS</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-22-8"><li class="nav-item"><a class="nav-link" href="/platform-integration/macos/install-macos">Add macOS as build target</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/macos/building">Build a macOS app</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/macos/c-interop">Bind to native code</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/macos/platform-views">Host a native macOS view</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-22-9" href="/platform-integration/web" role="button" aria-expanded="false" aria-controls="header-sidenav-22-9">Web</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-22-9"><li class="nav-item"><a class="nav-link" href="/platform-integration/web/">Web support in Flutter</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/web/install-web">Add web as build target</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/web/building">Build a web app</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/web/wasm">Compile to WebAssembly</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/web/initialization">Customize app initialization</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/web/embedding-flutter-web">Add Flutter to any web app</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/web/web-content-in-flutter">Web content in Flutter</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/web/renderers">Web renderers</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/web/web-images">Display images on the web</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/web/faq">Web FAQ</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-22-10" href="/platform-integration/windows" role="button" aria-expanded="false" aria-controls="header-sidenav-22-10">Windows</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-22-10"><li class="nav-item"><a class="nav-link" href="/platform-integration/windows/install-windows">Add Windows as build target</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/windows/building">Build a Windows app</a></li></ul></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#header-sidenav-23" role="button" aria-expanded="false" aria-controls="header-sidenav-23">Packages & plugins</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-23"><li class="nav-item"><a class="nav-link" href="/packages-and-plugins/using-packages">Use packages & plugins</a></li><li class="nav-item"><a class="nav-link" href="/packages-and-plugins/developing-packages">Develop packages & plugins</a></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-23-3" href="/packages-and-plugins/swift-package-manager" role="button" aria-expanded="false" aria-controls="header-sidenav-23-3">Swift Package Manager</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-23-3"><li class="nav-item"><a class="nav-link" href="/packages-and-plugins/swift-package-manager/for-app-developers">For app developers</a></li><li class="nav-item"><a class="nav-link" href="/packages-and-plugins/swift-package-manager/for-plugin-authors">For plugin authors</a></li></ul></li><div class="dropdown-divider"></div><li class="nav-item"><a class="nav-link" href="/packages-and-plugins/favorites">Flutter Favorites</a></li><li class="nav-item"><a class="nav-link" href="https://pub.dev/flutter" target="_blank" rel="noopener">Package repository</a></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#header-sidenav-24" role="button" aria-expanded="false" aria-controls="header-sidenav-24">Testing & debugging</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-24"><li class="nav-header">Testing</li><li class="nav-item"><a class="nav-link" href="/testing/overview">Overview</a></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-24-3" href="#header-sidenav-24-3" role="button" aria-expanded="false" aria-controls="header-sidenav-24-3">Unit testing</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-24-3"><li class="nav-item"><a class="nav-link" href="/cookbook/testing/unit/introduction">Introduction</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/testing/unit/mocking">Mock dependencies</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-24-4" href="#header-sidenav-24-4" role="button" aria-expanded="false" aria-controls="header-sidenav-24-4">Widget testing</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-24-4"><li class="nav-item"><a class="nav-link" href="/cookbook/testing/widget/introduction">Introduction</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/testing/widget/finders">Find widgets</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/testing/widget/scrolling">Simulate scrolling</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/testing/widget/tap-drag">Simulate user interaction</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#header-sidenav-24-5" href="#header-sidenav-24-5" role="button" aria-expanded="false" aria-controls="header-sidenav-24-5">Integration testing</a><ul class="nav flex-column flex-nowrap collapse" id="header-sidenav-24-5"><li class="nav-item"><a class="nav-link" href="/cookbook/testing/integration/introduction">Introduction</a></li><li class="nav-item"><a class="nav-link" href="/testing/integration-tests">Write and run an integration test</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/testing/integration/profiling">Profile an integration test</a></li></ul></li><li class="nav-item"><a class="nav-link" href="/testing/testing-plugins">Test a plugin</a></li><li class="nav-item"><a class="nav-link" href="/testing/plugins-in-tests">Handle plugin code in tests</a></li><li class="nav-header">Debugging</li><li class="nav-item"><a class="nav-link" href="/testing/debugging">Debugging tools</a></li><li class="nav-item"><a class="nav-link" href="/testing/code-debugging">Debug your app programmatically</a></li><li class="nav-item"><a class="nav-link" href="/testing/native-debugging">Use a native language debugger</a></li><li class="nav-item"><a class="nav-link" href="/testing/build-modes">Flutter's build modes</a></li><li 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href="/perf/deferred-components">Deferred components</a></li><li class="nav-item"><a class="nav-link" href="/perf/rendering-performance">Rendering performance</a></li><li class="nav-item"><a class="nav-link" href="/perf/ui-performance">Performance profiling</a></li><li class="nav-item"><a class="nav-link" href="/perf/web-performance">Performance profiling for web</a></li><li class="nav-item"><a class="nav-link" href="/perf/shader">Shader compilation jank</a></li><li class="nav-item"><a class="nav-link" href="/perf/metrics">Performance metrics</a></li><li class="nav-item"><a class="nav-link" href="/perf/isolates">Concurrency and isolates</a></li><li class="nav-item"><a class="nav-link" href="/perf/faq">Performance FAQ</a></li><li class="nav-item"><a class="nav-link" href="/perf/appendix">Appendix</a></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#header-sidenav-26" role="button" aria-expanded="false" 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collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-5-3" href="#fixed-sidenav-5-3" role="button" aria-expanded="false" aria-controls="fixed-sidenav-5-3">Games</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-5-3"><li class="nav-item"><a class="nav-link" href="/resources/games-toolkit">Overview</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/games/achievements-leaderboard">Add achievements and leaderboards</a></li><li class="nav-item"><a class="nav-link" href="https://firebase.google.com/codelabs/build-leaderboards-with-firestore#0" target="_blank" rel="noopener">Build leaderboards with Firestore</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/plugins/google-mobile-ads">Add advertising</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/games/firestore-multiplayer">Add multiplayer support</a></li><li class="nav-item"><a class="nav-link" href="https://codelabs.developers.google.com/codelabs/flutter-in-app-purchases" target="_blank" rel="noopener">Add in-app purchases</a></li><li class="nav-item"><a class="nav-link" href="https://firebase.google.com/codelabs/firebase-auth-in-flutter-apps" target="_blank" rel="noopener">Add user authentication</a></li><li class="nav-item"><a class="nav-link" href="https://firebase.google.com/docs/crashlytics/get-started?platform=flutter" target="_blank" rel="noopener">Debug using Crashlytics</a></li><li class="nav-item"><a class="nav-link" href="https://codelabs.developers.google.com/codelabs/flutter-flame-brick-breaker" target="_blank" rel="noopener">Intro to Flame with Flutter</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-5-4" href="#fixed-sidenav-5-4" role="button" aria-expanded="false" aria-controls="fixed-sidenav-5-4">Monetization</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-5-4"><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-5-4-1" href="#fixed-sidenav-5-4-1" role="button" aria-expanded="false" aria-controls="fixed-sidenav-5-4-1">Advertising</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-5-4-1"><li class="nav-item"><a class="nav-link" href="/resources/ads-overview">Ads overview</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/plugins/google-mobile-ads">Add advertising</a></li><li class="nav-item"><a class="nav-link" href="https://codelabs.developers.google.com/codelabs/admob-ads-in-flutter" target="_blank" rel="noopener">Add AdMob ads to your Flutter app</a></li><li class="nav-item"><a class="nav-link" href="https://codelabs.developers.google.com/codelabs/admob-inline-ads-in-flutter" target="_blank" rel="noopener">Add an AdMob banner and native inline ads</a></li><li class="nav-item"><a class="nav-link" href="https://developers.google.com/admob/flutter/mediation" target="_blank" rel="noopener">Google AdMob mediation</a></li><li class="nav-item"><a class="nav-link" href="https://pub.dev/packages/interactive_media_ads" target="_blank" rel="noopener">Interactive Media Ads SDK</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-5-4-2" href="#fixed-sidenav-5-4-2" role="button" aria-expanded="false" aria-controls="fixed-sidenav-5-4-2">In-app purchases</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-5-4-2"><li class="nav-item"><a class="nav-link" href="/resources/in-app-purchases-overview">In-app purchases overview</a></li><li class="nav-item"><a class="nav-link" href="https://codelabs.developers.google.com/codelabs/flutter-in-app-purchases" target="_blank" rel="noopener">Add in-app purchases</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-5-4-3" href="#fixed-sidenav-5-4-3" role="button" aria-expanded="false" aria-controls="fixed-sidenav-5-4-3">Payments</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-5-4-3"><li class="nav-item"><a class="nav-link" href="/resources/payments-overview">Payments overview</a></li><li class="nav-item"><a class="nav-link" href="https://pub.dev/packages/pay" target="_blank" rel="noopener">Google pay package</a></li></ul></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-5-5" href="#fixed-sidenav-5-5" role="button" aria-expanded="false" aria-controls="fixed-sidenav-5-5">Maps</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-5-5"><li class="nav-item"><a class="nav-link" href="https://codelabs.developers.google.com/codelabs/google-maps-in-flutter" target="_blank" rel="noopener">Add Google maps to a Flutter app</a></li><li class="nav-item"><a class="nav-link" href="https://developers.google.com/maps/flutter-package" target="_blank" rel="noopener">Google Maps package</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-5-6" href="#fixed-sidenav-5-6" role="button" aria-expanded="false" aria-controls="fixed-sidenav-5-6">News</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-5-6"><li class="nav-item"><a class="nav-link" href="/resources/news-toolkit">Build a news app</a></li></ul></li></ul></li><li aria-hidden="true"><div class="sidebar-primary-divider"></div></li><li class="nav-header">User interface</li><li class="nav-item"><a class="nav-link" href="/ui">Introduction</a></li><li class="nav-item"><a class="nav-link" href="/ui/widgets">Widget catalog</a></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#fixed-sidenav-10" role="button" aria-expanded="false" aria-controls="fixed-sidenav-10">Layout</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-10"><li class="nav-item"><a class="nav-link" href="/ui/layout">Introduction</a></li><li class="nav-item"><a class="nav-link" href="/ui/layout/tutorial">Build a layout</a></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-10-3" href="/ui/layout/lists" role="button" aria-expanded="false" aria-controls="fixed-sidenav-10-3">Lists & grids</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-10-3"><li class="nav-item"><a class="nav-link" href="/cookbook/lists/basic-list">Create and use lists</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/lists/horizontal-list">Create a horizontal list</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/lists/grid-lists">Create a grid view</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/lists/mixed-list">Create lists with different types of items</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/lists/spaced-items">Create lists with spaced items</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/lists/long-lists">Work with long lists</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-10-4" href="/ui/layout/scrolling" role="button" aria-expanded="false" aria-controls="fixed-sidenav-10-4">Scrolling</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-10-4"><li class="nav-item"><a class="nav-link" href="/ui/layout/scrolling">Overview</a></li><li class="nav-item"><a class="nav-link" href="/ui/layout/scrolling/slivers">Use slivers to achieve fancy scrolling</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/lists/floating-app-bar">Place a floating app bar above a list</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/effects/parallax-scrolling">Create a scrolling parallax effect</a></li></ul></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#fixed-sidenav-11" role="button" aria-expanded="false" aria-controls="fixed-sidenav-11">Adaptive & responsive design</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-11"><li class="nav-item"><a class="nav-link" href="/ui/adaptive-responsive">Overview</a></li><li class="nav-item"><a class="nav-link" href="/ui/adaptive-responsive/general">General approach</a></li><li class="nav-item"><a class="nav-link" href="/ui/adaptive-responsive/safearea-mediaquery">SafeArea & MediaQuery</a></li><li class="nav-item"><a class="nav-link" href="/ui/adaptive-responsive/large-screens">Large screens & foldables</a></li><li class="nav-item"><a class="nav-link" href="/ui/adaptive-responsive/input">User input & accessibility</a></li><li class="nav-item"><a class="nav-link" href="/ui/adaptive-responsive/capabilities">Capabilities & policies</a></li><li class="nav-item"><a class="nav-link" href="/ui/adaptive-responsive/best-practices">Best practices</a></li><li class="nav-item"><a class="nav-link" href="/ui/adaptive-responsive/more-info">Additional resources</a></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#fixed-sidenav-12" role="button" aria-expanded="false" aria-controls="fixed-sidenav-12">Design & theming</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-12"><li class="nav-item"><a class="nav-link" href="/cookbook/design/themes">Share styles with themes</a></li><li class="nav-item"><a class="nav-link" href="/ui/design/material">Material design</a></li><li class="nav-item"><a class="nav-link" href="/release/breaking-changes/material-3-migration">Migrate to Material 3</a></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-12-4" href="/ui/design/text" role="button" aria-expanded="false" aria-controls="fixed-sidenav-12-4">Text</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-12-4"><li class="nav-item"><a class="nav-link" href="/ui/design/text/typography">Fonts & typography</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/design/fonts">Use a custom font</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/design/package-fonts">Export fonts from a package</a></li><li class="nav-item"><a class="nav-link" href="https://pub.dev/packages/google_fonts" target="_blank" rel="noopener">Google Fonts package</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-12-5" href="/ui/design/graphics" role="button" aria-expanded="false" aria-controls="fixed-sidenav-12-5">Custom graphics</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-12-5"><li class="nav-item"><a class="nav-link" href="/ui/design/graphics/fragment-shaders">Use custom fragment shaders</a></li></ul></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#fixed-sidenav-13" role="button" aria-expanded="false" aria-controls="fixed-sidenav-13">Interactivity</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-13"><li class="nav-item"><a class="nav-link" href="/ui/interactivity">Add interactivity to your app</a></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-13-2" href="/ui/interactivity/gestures" role="button" aria-expanded="false" aria-controls="fixed-sidenav-13-2">Gestures</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-13-2"><li class="nav-item"><a class="nav-link" href="/ui/interactivity/gestures">Introduction</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/gestures/handling-taps">Handle taps</a></li><li class="nav-item"><a class="nav-link" href="/ui/interactivity/gestures/drag-outside">Drag an object outside an app</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/effects/drag-a-widget">Drag a UI element within an app</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/gestures/ripples">Add Material touch ripples</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/gestures/dismissible">Implement swipe to dismiss</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-13-3" href="/ui/interactivity/input" role="button" aria-expanded="false" aria-controls="fixed-sidenav-13-3">Input & forms</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-13-3"><li class="nav-item"><a class="nav-link" href="/cookbook/forms/text-input">Create and style a text field</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/forms/retrieve-input">Retrieve the value of a text field</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/forms/text-field-changes">Handle changes to a text field</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/forms/focus">Manage focus in text fields</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/forms/validation">Build a form with validation</a></li></ul></li><li class="nav-item"><a class="nav-link" href="/cookbook/design/snackbars">Display a snackbar</a></li><li class="nav-item"><a class="nav-link" href="/ui/interactivity/actions-and-shortcuts">Implement actions & shortcuts</a></li><li class="nav-item"><a class="nav-link" href="/ui/interactivity/focus">Manage keyboard focus</a></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#fixed-sidenav-14" role="button" aria-expanded="false" aria-controls="fixed-sidenav-14">Assets & media</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-14"><li class="nav-item"><a class="nav-link" href="/ui/assets/assets-and-images">Add assets and images</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/images/network-image">Display images from the internet</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/images/fading-in-images">Fade in images with a placeholder</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/plugins/play-video">Play and pause a video</a></li><li class="nav-item"><a class="nav-link" href="/ui/assets/asset-transformation">Transform assets at build time</a></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#fixed-sidenav-15" role="button" aria-expanded="false" aria-controls="fixed-sidenav-15">Navigation & routing</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-15"><li class="nav-item"><a class="nav-link" href="/ui/navigation">Overview</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/design/tabs">Add tabs to your app</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/navigation/navigation-basics">Navigate to a new screen and back</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/navigation/passing-data">Send data to a new screen</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/navigation/returning-data">Return data from a screen</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/design/drawer">Add a drawer to a screen</a></li><li class="nav-item"><a class="nav-link" href="/ui/navigation/deep-linking">Set up deep linking</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/navigation/set-up-app-links">Set up app links for Android</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/navigation/set-up-universal-links">Set up universal links for iOS</a></li><li class="nav-item"><a class="nav-link" href="/ui/navigation/url-strategies">Configure web URL strategies</a></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#fixed-sidenav-16" role="button" aria-expanded="false" aria-controls="fixed-sidenav-16">Animations & transitions</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-16"><li class="nav-item"><a class="nav-link" href="/ui/animations">Introduction</a></li><li class="nav-item"><a class="nav-link" href="/ui/animations/tutorial">Tutorial</a></li><li class="nav-item"><a class="nav-link" href="/ui/animations/implicit-animations">Implicit animations</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/animation/animated-container">Animate the properties of a container</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/animation/opacity-animation">Fade a widget in and out</a></li><li class="nav-item"><a class="nav-link" href="/ui/animations/hero-animations">Hero animations</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/animation/page-route-animation">Animate a page route transition</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/animation/physics-simulation">Animate using a physics simulation</a></li><li class="nav-item"><a class="nav-link" href="/ui/animations/staggered-animations">Staggered animations</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/effects/staggered-menu-animation">Create a staggered menu animation</a></li><li class="nav-item"><a class="nav-link" href="/ui/animations/overview">API overview</a></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#fixed-sidenav-17" role="button" aria-expanded="false" aria-controls="fixed-sidenav-17">Accessibility & internationalization</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-17"><li class="nav-item"><a class="nav-link" href="/ui/accessibility-and-internationalization/accessibility">Accessibility</a></li><li class="nav-item"><a class="nav-link" href="/ui/accessibility-and-internationalization/internationalization">Internationalization</a></li></ul></li><li aria-hidden="true"><div class="sidebar-primary-divider"></div></li><li class="nav-header">Beyond UI</li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#fixed-sidenav-20" role="button" aria-expanded="false" aria-controls="fixed-sidenav-20">Data & backend</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-20"><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-20-1" href="/data-and-backend/state-mgmt" role="button" aria-expanded="false" aria-controls="fixed-sidenav-20-1">State management</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-20-1"><li class="nav-item"><a class="nav-link" href="/data-and-backend/state-mgmt/intro">Introduction</a></li><li class="nav-item"><a class="nav-link" href="/data-and-backend/state-mgmt/declarative">Think declaratively</a></li><li class="nav-item"><a class="nav-link" href="/data-and-backend/state-mgmt/ephemeral-vs-app">Ephemeral vs app state</a></li><li class="nav-item"><a class="nav-link" href="/data-and-backend/state-mgmt/simple">Simple app state management</a></li><li class="nav-item"><a class="nav-link" href="/data-and-backend/state-mgmt/options">Options</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-20-2" href="/data-and-backend/networking" role="button" aria-expanded="false" aria-controls="fixed-sidenav-20-2">Networking & http</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-20-2"><li class="nav-item"><a class="nav-link" href="/data-and-backend/networking">Overview</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/networking/fetch-data">Fetch data from the internet</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/networking/authenticated-requests">Make authenticated requests</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/networking/send-data">Send data to the internet</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/networking/update-data">Update data over the internet</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/networking/delete-data">Delete data on the internet</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/networking/web-sockets">Communicate with WebSockets</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-20-3" href="/data-and-backend/serialization" role="button" aria-expanded="false" aria-controls="fixed-sidenav-20-3">Serialization</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-20-3"><li class="nav-item"><a class="nav-link" href="/data-and-backend/serialization/json">JSON serialization</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/networking/background-parsing">Parse JSON in the background</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-20-4" href="/data-and-backend/persistence" role="button" aria-expanded="false" aria-controls="fixed-sidenav-20-4">Persistence</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-20-4"><li class="nav-item"><a class="nav-link" href="/cookbook/persistence/key-value">Store key-value data on disk</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/persistence/reading-writing-files">Read and write files</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/persistence/sqlite">Persist data with SQLite</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-20-5" href="/data-and-backend/firebase" role="button" aria-expanded="false" aria-controls="fixed-sidenav-20-5">Firebase</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-20-5"><li class="nav-item"><a class="nav-link" href="/data-and-backend/firebase">Overview</a></li><li class="nav-item"><a class="nav-link" href="https://firebase.google.com/docs/flutter/setup" target="_blank" rel="noopener">Add Firebase to your Flutter app</a></li></ul></li><li class="nav-item"><a class="nav-link" href="/data-and-backend/google-apis">Google APIs</a></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#fixed-sidenav-21" role="button" aria-expanded="false" aria-controls="fixed-sidenav-21">App architecture</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-21"><li class="nav-item"><a class="nav-link" href="/app-architecture">Introduction</a></li><li class="nav-item"><a class="nav-link" href="/app-architecture/concepts">Architecture concepts</a></li><li class="nav-item"><a class="nav-link" href="/app-architecture/guide">Guide to app architecture</a></li><li class="nav-item"><a class="nav-link" href="/app-architecture/recommendations">Recommendations</a></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-21-5" href="/cookbook/architecture" role="button" aria-expanded="false" aria-controls="fixed-sidenav-21-5">Design patterns</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-21-5"><li class="nav-item"><a class="nav-link" href="/cookbook/architecture/optimistic-state">Optimistic state</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/architecture/key-value-data">Persistent storage architecture: Key-value data</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/architecture/sql">Persistent storage architecture: SQL</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/architecture/offline-first">Offline-first</a></li></ul></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#fixed-sidenav-22" role="button" aria-expanded="false" aria-controls="fixed-sidenav-22">Platform integration</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-22"><li class="nav-item"><a class="nav-link" href="/reference/supported-platforms">Supported platforms</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/desktop">Build desktop apps with Flutter</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/platform-channels">Write platform-specific code</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/platform-adaptations">Automatic platform adaptations</a></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-22-5" href="/platform-integration/android" role="button" aria-expanded="false" aria-controls="fixed-sidenav-22-5">Android</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-22-5"><li class="nav-item"><a class="nav-link" href="/platform-integration/android/install-android">Add Android as build target</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/android/splash-screen">Add a splash screen</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/android/predictive-back">Add predictive back</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/android/c-interop">Bind to native code</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/android/platform-views">Host a native Android view</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/android/compose-activity">Launch a Jetpack Compose activity</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/android/restore-state-android">Restore state on Android</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/android/chromeos">Target ChromeOS with Android</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-22-6" href="/platform-integration/ios" role="button" aria-expanded="false" aria-controls="fixed-sidenav-22-6">iOS</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-22-6"><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/install-ios">Add iOS as build target</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/ios-latest">Flutter on latest iOS</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/apple-frameworks">Leverage Apple's system libraries</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/launch-screen">Add a launch screen</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/ios-app-clip">Add iOS App Clip support</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/app-extensions">Add iOS app extensions</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/c-interop">Bind to native code</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/platform-views">Host a native iOS view</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/ios-debugging">Enable debugging on iOS</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/ios/restore-state-ios">Restore state on iOS</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-22-7" href="/platform-integration/linux" role="button" aria-expanded="false" aria-controls="fixed-sidenav-22-7">Linux</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-22-7"><li class="nav-item"><a class="nav-link" href="/platform-integration/linux/install-linux">Add Linux as build target</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/linux/building">Build a Linux app</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-22-8" href="/platform-integration/macos" role="button" aria-expanded="false" aria-controls="fixed-sidenav-22-8">macOS</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-22-8"><li class="nav-item"><a class="nav-link" href="/platform-integration/macos/install-macos">Add macOS as build target</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/macos/building">Build a macOS app</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/macos/c-interop">Bind to native code</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/macos/platform-views">Host a native macOS view</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-22-9" href="/platform-integration/web" role="button" aria-expanded="false" aria-controls="fixed-sidenav-22-9">Web</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-22-9"><li class="nav-item"><a class="nav-link" href="/platform-integration/web/">Web support in Flutter</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/web/install-web">Add web as build target</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/web/building">Build a web app</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/web/wasm">Compile to WebAssembly</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/web/initialization">Customize app initialization</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/web/embedding-flutter-web">Add Flutter to any web app</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/web/web-content-in-flutter">Web content in Flutter</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/web/renderers">Web renderers</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/web/web-images">Display images on the web</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/web/faq">Web FAQ</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-22-10" href="/platform-integration/windows" role="button" aria-expanded="false" aria-controls="fixed-sidenav-22-10">Windows</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-22-10"><li class="nav-item"><a class="nav-link" href="/platform-integration/windows/install-windows">Add Windows as build target</a></li><li class="nav-item"><a class="nav-link" href="/platform-integration/windows/building">Build a Windows app</a></li></ul></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#fixed-sidenav-23" role="button" aria-expanded="false" aria-controls="fixed-sidenav-23">Packages & plugins</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-23"><li class="nav-item"><a class="nav-link" href="/packages-and-plugins/using-packages">Use packages & plugins</a></li><li class="nav-item"><a class="nav-link" href="/packages-and-plugins/developing-packages">Develop packages & plugins</a></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-23-3" href="/packages-and-plugins/swift-package-manager" role="button" aria-expanded="false" aria-controls="fixed-sidenav-23-3">Swift Package 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class="nav-link" href="/testing/overview">Overview</a></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-24-3" href="#fixed-sidenav-24-3" role="button" aria-expanded="false" aria-controls="fixed-sidenav-24-3">Unit testing</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-24-3"><li class="nav-item"><a class="nav-link" href="/cookbook/testing/unit/introduction">Introduction</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/testing/unit/mocking">Mock dependencies</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-24-4" href="#fixed-sidenav-24-4" role="button" aria-expanded="false" aria-controls="fixed-sidenav-24-4">Widget testing</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-24-4"><li class="nav-item"><a class="nav-link" href="/cookbook/testing/widget/introduction">Introduction</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/testing/widget/finders">Find widgets</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/testing/widget/scrolling">Simulate scrolling</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/testing/widget/tap-drag">Simulate user interaction</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-24-5" href="#fixed-sidenav-24-5" role="button" aria-expanded="false" aria-controls="fixed-sidenav-24-5">Integration testing</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-24-5"><li class="nav-item"><a class="nav-link" href="/cookbook/testing/integration/introduction">Introduction</a></li><li class="nav-item"><a class="nav-link" href="/testing/integration-tests">Write and run an integration test</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/testing/integration/profiling">Profile an integration test</a></li></ul></li><li class="nav-item"><a class="nav-link" href="/testing/testing-plugins">Test a plugin</a></li><li class="nav-item"><a class="nav-link" href="/testing/plugins-in-tests">Handle plugin code in tests</a></li><li class="nav-header">Debugging</li><li class="nav-item"><a class="nav-link" href="/testing/debugging">Debugging tools</a></li><li class="nav-item"><a class="nav-link" href="/testing/code-debugging">Debug your app programmatically</a></li><li class="nav-item"><a class="nav-link" href="/testing/native-debugging">Use a native language debugger</a></li><li class="nav-item"><a class="nav-link" href="/testing/build-modes">Flutter's build modes</a></li><li class="nav-item"><a class="nav-link" href="/testing/common-errors">Common Flutter errors</a></li><li class="nav-item"><a class="nav-link" href="/testing/errors">Handle errors</a></li><li class="nav-item"><a class="nav-link" href="/cookbook/maintenance/error-reporting">Report errors to a service</a></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#fixed-sidenav-25" role="button" aria-expanded="false" aria-controls="fixed-sidenav-25">Performance & optimization</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-25"><li class="nav-item"><a class="nav-link" href="/perf">Overview</a></li><li class="nav-item"><a class="nav-link" href="/perf/impeller">Impeller</a></li><li class="nav-item"><a class="nav-link" href="/perf/best-practices">Performance best practices</a></li><li class="nav-item"><a class="nav-link" href="/perf/app-size">App size</a></li><li class="nav-item"><a class="nav-link" href="/perf/deferred-components">Deferred components</a></li><li class="nav-item"><a class="nav-link" href="/perf/rendering-performance">Rendering performance</a></li><li class="nav-item"><a class="nav-link" href="/perf/ui-performance">Performance profiling</a></li><li class="nav-item"><a class="nav-link" href="/perf/web-performance">Performance profiling for web</a></li><li class="nav-item"><a class="nav-link" href="/perf/shader">Shader compilation jank</a></li><li class="nav-item"><a class="nav-link" href="/perf/metrics">Performance metrics</a></li><li class="nav-item"><a class="nav-link" href="/perf/isolates">Concurrency and isolates</a></li><li class="nav-item"><a class="nav-link" href="/perf/faq">Performance FAQ</a></li><li class="nav-item"><a class="nav-link" href="/perf/appendix">Appendix</a></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#fixed-sidenav-26" role="button" aria-expanded="false" aria-controls="fixed-sidenav-26">Deployment</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-26"><li class="nav-item"><a class="nav-link" href="/deployment/obfuscate">Obfuscate Dart code</a></li><li class="nav-item"><a class="nav-link" href="/deployment/flavors">Create flavors of an app</a></li><li class="nav-item"><a class="nav-link" href="/deployment/android">Build and release an Android app</a></li><li class="nav-item"><a class="nav-link" href="/deployment/ios">Build and release an iOS app</a></li><li class="nav-item"><a class="nav-link" href="/deployment/macos">Build and release a macOS app</a></li><li class="nav-item"><a class="nav-link" href="/deployment/linux">Build and release a Linux app</a></li><li class="nav-item"><a class="nav-link" href="/deployment/windows">Build and release a Windows app</a></li><li class="nav-item"><a class="nav-link" href="/deployment/web">Build and release a web app</a></li><li class="nav-item"><a class="nav-link" href="/deployment/cd">Set up continuous deployment</a></li></ul></li><li class="nav-item"><a class="nav-link collapsed collapsible" data-toggle="collapse" href="#fixed-sidenav-27" role="button" aria-expanded="false" aria-controls="fixed-sidenav-27">Add to an existing app</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-27"><li class="nav-item"><a class="nav-link" href="/add-to-app">Introduction</a></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-27-2" href="/add-to-app/android" role="button" aria-expanded="false" aria-controls="fixed-sidenav-27-2">Add to an Android app</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-27-2"><li class="nav-item"><a class="nav-link" href="/add-to-app/android/project-setup">Set up Android project</a></li><li class="nav-item"><a class="nav-link" href="/add-to-app/android/add-flutter-screen">Add a single Flutter screen</a></li><li class="nav-item"><a class="nav-link" href="/add-to-app/android/add-flutter-fragment">Add a Flutter Fragment</a></li><li class="nav-item"><a class="nav-link" href="/add-to-app/android/add-flutter-view">Add a Flutter View</a></li><li class="nav-item"><a class="nav-link" href="/add-to-app/android/plugin-setup">Use a Flutter plugin</a></li></ul></li><li class="nav-item"><a class="nav-link collapsible collapsed" data-toggle="collapse" data-target="#fixed-sidenav-27-3" href="/add-to-app/ios" role="button" aria-expanded="false" aria-controls="fixed-sidenav-27-3">Add to an iOS app</a><ul class="nav flex-column flex-nowrap collapse" id="fixed-sidenav-27-3"><li class="nav-item"><a class="nav-link" href="/add-to-app/ios/project-setup">Set up iOS project</a></li><li class="nav-item"><a class="nav-link" href="/add-to-app/ios/add-flutter-screen">Add a single Flutter screen</a></li></ul></li><li class="nav-item"><a class="nav-link" href="/platform-integration/web/embedding-flutter-web">Add to a web app</a></li><li class="nav-item"><a class="nav-link" href="/add-to-app/debugging">Debug embedded Flutter module</a></li><li class="nav-item"><a class="nav-link" href="/add-to-app/multiple-flutters">Add multiple Flutter instances</a></li><li class="nav-item"><a class="nav-link" href="/add-to-app/performance">Loading sequence and performance</a></li></ul></li><li aria-hidden="true"><div class="sidebar-primary-divider"></div></li><li class="nav-item"><a class="nav-link active collapsible" data-toggle="collapse" href="#fixed-sidenav-29" role="button" aria-expanded="true" aria-controls="fixed-sidenav-29">Tools & editors</a><ul class="nav flex-column flex-nowrap collapse show" id="fixed-sidenav-29"><li class="nav-item"><a class="nav-link" href="/tools/android-studio">Android Studio & IntelliJ</a></li><li class="nav-item"><a class="nav-link" href="/tools/vs-code">Visual Studio Code</a></li><li class="nav-item"><a class="nav-link active collapsible" data-toggle="collapse" data-target="#fixed-sidenav-29-3" href="/tools/devtools" role="button" aria-expanded="true" aria-controls="fixed-sidenav-29-3">DevTools</a><ul class="nav flex-column flex-nowrap collapse show" id="fixed-sidenav-29-3"><li class="nav-item"><a class="nav-link" href="/tools/devtools">Overview</a></li><li class="nav-item"><a class="nav-link" href="/tools/devtools/android-studio">Run from Android Studio & IntelliJ</a></li><li class="nav-item"><a class="nav-link" href="/tools/devtools/vscode">Run from VS Code</a></li><li class="nav-item"><a class="nav-link" href="/tools/devtools/cli">Run from command line</a></li><li class="nav-item"><a class="nav-link" href="/tools/devtools/inspector">Flutter inspector</a></li><li class="nav-item"><a class="nav-link" href="/tools/devtools/performance">Performance view</a></li><li class="nav-item"><a class="nav-link" href="/tools/devtools/cpu-profiler">CPU Profiler view</a></li><li class="nav-item"><a class="nav-link" href="/tools/devtools/memory">Memory view</a></li><li class="nav-item"><a class="nav-link" href="/tools/devtools/console">Debug console view</a></li><li class="nav-item"><a class="nav-link" href="/tools/devtools/network">Network view</a></li><li class="nav-item"><a class="nav-link" 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col-xl-8 offset-xl-2 col-xxl-8 offset-xxl-2"><div id="site-toc--side" class="site-toc fixed-col col-xl-2 order-3" data-fixed-column><header class="site-toc__title">Contents</header><ul class="section-nav"><li class="toc-entry nav-item toc-h2"><a class="nav-link" href="#what-is-it">What is it?</a><ul class="nav"><li class="toc-entry nav-item toc-h3"><a class="nav-link" href="#what-is-size-information">What is "size information"?</a></li><li class="toc-entry nav-item toc-h3"><a class="nav-link" href="#dart-size-information">Dart size information</a></li></ul></li><li class="toc-entry nav-item toc-h2"><a class="nav-link" href="#how-to-use-it">How to use it</a></li><li class="toc-entry nav-item toc-h2"><a class="nav-link" href="#analysis-tab">Analysis tab</a><ul class="nav"><li class="toc-entry nav-item toc-h3"><a class="nav-link" href="#loading-a-size-file">Loading a size file</a></li><li class="toc-entry nav-item toc-h3"><a class="nav-link" href="#treemap-and-table">Treemap and table</a></li><li class="toc-entry nav-item toc-h3"><a class="nav-link" href="#dominator-tree-and-call-graph">Dominator tree and call graph</a></li></ul></li><li class="toc-entry nav-item toc-h2"><a class="nav-link" href="#diff-tab">Diff tab</a><ul class="nav"><li class="toc-entry nav-item toc-h3"><a class="nav-link" href="#loading-size-files">Loading size files</a></li><li class="toc-entry nav-item toc-h3"><a class="nav-link" href="#treemap-and-table-1">Treemap and table</a></li></ul></li><li class="toc-entry nav-item toc-h2"><a class="nav-link" href="#generating-size-files">Generating size files</a></li><li class="toc-entry nav-item toc-h2"><a class="nav-link" href="#other-resources">Other resources</a></li></ul></div><div class="container"><header class="site-content__title" id="site-content-title"><h1>Use the app size tool</h1><nav class="breadcrumbs" aria-label="breadcrumb"><ol class="breadcrumb-list" vocab="https://schema.org/" typeof="BreadcrumbList"><li class="breadcrumb-item" property="itemListElement" typeof="ListItem"><a href="/tools" property="item" typeof="WebPage"><span property="name">Tools</span></a><meta property="position" content="0"><span class="material-symbols-outlined child-icon" aria-hidden="true">chevron_right</span></li><li class="breadcrumb-item" property="itemListElement" typeof="ListItem"><a href="/tools/devtools" property="item" typeof="WebPage"><span property="name">Flutter and Dart DevTools</span></a><meta property="position" content="1"><span class="material-symbols-outlined child-icon" aria-hidden="true">chevron_right</span></li><li class="breadcrumb-item active" property="itemListElement" typeof="ListItem" aria-current="page"><a href="/tools/devtools/app-size" property="item" typeof="WebPage"><span property="name">Use the app size tool</span></a><meta property="position" content="2"></li></ol></nav></header><div id="site-toc--inline" class="site-toc toc-collapsible toc-collapsed"><header class="site-toc__title">Contents <span class="site-toc--inline__toggle toc-toggle-down" title="Expand table of contents"><i class="material-symbols" aria-hidden="true">keyboard_arrow_down</i></span> <span class="site-toc--inline__toggle toc-toggle-up" title="Collapse table of contents"><i class="material-symbols" aria-hidden="true">keyboard_arrow_up</i></span></header><ul class="section-nav"><li class="toc-entry toc-h2"><a href="#what-is-it">What is it?</a><ul><li class="toc-entry toc-h3"><a href="#what-is-size-information">What is "size information"?</a></li><li class="toc-entry toc-h3"><a href="#dart-size-information">Dart size information</a></li></ul></li><li class="toc-entry toc-h2"><a href="#how-to-use-it">How to use it</a></li><li class="toc-entry toc-h2"><a href="#analysis-tab">Analysis tab</a><ul><li class="toc-entry toc-h3"><a href="#loading-a-size-file">Loading a size file</a></li><li class="toc-entry toc-h3"><a href="#treemap-and-table">Treemap and table</a></li><li class="toc-entry toc-h3"><a href="#dominator-tree-and-call-graph">Dominator tree and call graph</a></li></ul></li><li class="toc-entry toc-h2"><a href="#diff-tab">Diff tab</a><ul><li class="toc-entry toc-h3"><a href="#loading-size-files">Loading size files</a></li><li class="toc-entry toc-h3"><a href="#treemap-and-table-1">Treemap and table</a></li></ul></li><li class="toc-entry toc-h2"><a href="#generating-size-files">Generating size files</a></li><li class="toc-entry toc-h2"><a href="#other-resources">Other resources</a></li></ul><span class="site-toc--inline__toggle toc-toggle-more-items" title="Expand table of contents"><i class="material-symbols" aria-hidden="true">more_horiz</i></span></div><div class="header-wrapper"><h2 id="what-is-it">What is it?</h2><a class="heading-link" href="#what-is-it" aria-label="Link to 'What is it?' section">#</a></div><p>The app size tool allows you to analyze the total size of your app. You can view a single snapshot of "size information" using the <a href="#analysis-tab">Analysis tab</a>, or compare two different snapshots of "size information" using the <a href="#diff-tab">Diff tab</a>.</p><div class="header-wrapper"><h3 id="what-is-size-information">What is "size information"?</h3><a class="heading-link" href="#what-is-size-information" aria-label="Link to 'What is "size information"?' section">#</a></div><p>"Size information" contains size data for Dart code, native code, and non-code elements of your app, like the application package, assets and fonts. A "size information" file contains data for the total picture of your application size.</p><div class="header-wrapper"><h3 id="dart-size-information">Dart size information</h3><a class="heading-link" href="#dart-size-information" aria-label="Link to 'Dart size information' section">#</a></div><p>The Dart AOT compiler performs tree-shaking on your code when compiling your application (profile or release mode only—the AOT compiler is not used for debug builds, which are JIT compiled). This means that the compiler attempts to optimize your app's size by removing pieces of code that are unused or unreachable.</p><p>After the compiler optimizes your code as much as it can, the end result can be summarized as the collection of packages, libraries, classes, and functions that exist in the binary output, along with their size in bytes. This is the Dart portion of "size information" we can analyze in the app size tool to further optimize Dart code and track down size issues.</p><div class="header-wrapper"><h2 id="how-to-use-it">How to use it</h2><a class="heading-link" href="#how-to-use-it" aria-label="Link to 'How to use it' section">#</a></div><p>If DevTools is already connected to a running application, navigate to the "App Size" tab.</p><p><img src="/assets/images/docs/tools/devtools/app_size_tab.png" alt="Screenshot of app size tab"></p><p>If DevTools is not connected to a running application, you can access the tool from the landing page that appears once you have launched DevTools (see <a href="/tools/devtools#start">launch instructions</a>).</p><p><img src="/assets/images/docs/tools/devtools/app_size_access_landing_page.png" alt="Screenshot of app size access on landing page"></p><div class="header-wrapper"><h2 id="analysis-tab">Analysis tab</h2><a class="heading-link" href="#analysis-tab" aria-label="Link to 'Analysis tab' section">#</a></div><p>The analysis tab allows you to inspect a single snapshot of size information. You can view the hierarchical structure of the size data using the treemap and table, and you can view code attribution data (for example, why a piece of code is included in your compiled application) using the dominator tree and call graph.</p><p><img src="/assets/images/docs/tools/devtools/app_size_analysis.png" alt="Screenshot of app size analysis"></p><div class="header-wrapper"><h3 id="loading-a-size-file">Loading a size file</h3><a class="heading-link" href="#loading-a-size-file" aria-label="Link to 'Loading a size file' section">#</a></div><p>When you open the Analysis tab, you'll see instructions to load an app size file. Drag and drop an app size file into the dialog, and click "Analyze Size".</p><p><img src="/assets/images/docs/tools/devtools/app_size_load_analysis.png" alt="Screenshot of app size analysis loading screen"></p><p>See <a href="#generating-size-files">Generating size files</a> below for information on generating size files.</p><div class="header-wrapper"><h3 id="treemap-and-table">Treemap and table</h3><a class="heading-link" href="#treemap-and-table" aria-label="Link to 'Treemap and table' section">#</a></div><p>The treemap and table show the hierarchical data for your app's size.</p><div class="header-wrapper"><h4 id="use-the-treemap">Use the treemap</h4><a class="heading-link" href="#use-the-treemap" aria-label="Link to 'Use the treemap' section">#</a></div><p>A treemap is a visualization for hierarchical data. The space is broken up into rectangles, where each rectangle is sized and ordered by some quantitative variable (in this case, size in bytes). The area of each rectangle is proportional to the size the node occupies in the compiled application. Inside of each rectangle (call one A), there are additional rectangles that exist one level deeper in the data hierarchy (children of A).</p><p>To drill into a cell in the treemap, select the cell. This re-roots the tree so that the selected cell becomes the visual root of the treemap.</p><p>To navigate back, or up a level, use the breadcrumb navigator at the top of the treemap.</p><p><img src="/assets/images/docs/tools/devtools/treemap_breadcrumbs.png" alt="Screenshot of treemap breadcrumb navigator"></p><div class="header-wrapper"><h3 id="dominator-tree-and-call-graph">Dominator tree and call graph</h3><a class="heading-link" href="#dominator-tree-and-call-graph" aria-label="Link to 'Dominator tree and call graph' section">#</a></div><p>This section of the page shows code size attribution data (for example, why a piece of code is included in your compiled application). This data is visible in the form of a dominator tree as well as a call graph.</p><div class="header-wrapper"><h4 id="use-the-dominator-tree">Use the dominator tree</h4><a class="heading-link" href="#use-the-dominator-tree" aria-label="Link to 'Use the dominator tree' section">#</a></div><p>A <a href="https://en.wikipedia.org/wiki/Dominator_(graph_theory)">dominator tree</a> is a tree where each node's children are those nodes it immediately dominates. A node <code>a</code> is said to "dominate" a node <code>b</code> if every path to <code>b</code> must go through <code>a</code>.</p><p>To put it in context of app size analysis, imagine <code>package:a</code> imports both <code>package:b</code> and <code>package:c</code>, and both <code>package:b</code> and <code>package:c</code> import <code>package:d</code>.</p><div class="code-block-wrapper language-plaintext"><div class="code-block-body"><pre class="shiki dash-light" tabindex="0"><code><span class="line"><span>package:a</span></span> <span class="line"><span>|__ package:b</span></span> <span class="line"><span>| |__ package:d</span></span> <span class="line"><span>|__ package:c</span></span> <span class="line"><span> |__ package:d</span></span></code></pre></div></div><p>In this example, <code>package:a</code> dominates <code>package:d</code>, so the dominator tree for this data would look like:</p><div class="code-block-wrapper language-plaintext"><div class="code-block-body"><pre class="shiki dash-light" tabindex="0"><code><span class="line"><span>package:a</span></span> <span class="line"><span>|__ package:b</span></span> <span class="line"><span>|__ package:c</span></span> <span class="line"><span>|__ package:d</span></span></code></pre></div></div><p>This information is helpful for understanding why certain pieces of code are present in your compiled application. For example, if you are analyzing your app size and find an unexpected package included in your compiled app, you can use the dominator tree to trace the package to its root source.</p><p><img src="/assets/images/docs/tools/devtools/app_size_dominator_tree.png" alt="Screenshot of code size dominator tree"></p><div class="header-wrapper"><h4 id="use-the-call-graph">Use the call graph</h4><a class="heading-link" href="#use-the-call-graph" aria-label="Link to 'Use the call graph' section">#</a></div><p>A call graph provides similar information to the dominator tree in regards to helping you understand why code exists in a compiled application. However, instead of showing the one-to-many dominant relationships between nodes of code size data like the dominator tree, the call graph shows the many-to-many relationships that existing between nodes of code size data.</p><p>Again, using the following example:</p><div class="code-block-wrapper language-plaintext"><div class="code-block-body"><pre class="shiki dash-light" tabindex="0"><code><span class="line"><span>package:a</span></span> <span class="line"><span>|__ package:b</span></span> <span class="line"><span>| |__ package:d</span></span> <span class="line"><span>|__ package:c</span></span> <span class="line"><span> |__ package:d</span></span></code></pre></div></div><p>The call graph for this data would link <code>package:d</code> to its direct callers, <code>package:b</code> and <code>package:c</code>, instead of its "dominator", <code>package:a</code>.</p><div class="code-block-wrapper language-plaintext"><div class="code-block-body"><pre class="shiki dash-light" tabindex="0"><code><span class="line"><span>package:a --> package:b --></span></span> <span class="line"><span> package:d</span></span> <span class="line"><span>package:a --> package:c --></span></span></code></pre></div></div><p>This information is useful for understanding the fine-grained dependencies of between pieces of your code (packages, libraries, classes, functions).</p><p><img src="/assets/images/docs/tools/devtools/app_size_call_graph.png" alt="Screenshot of code size call graph"></p><div class="header-wrapper"><h4 id="should-i-use-the-dominator-tree-or-the-call-graph">Should I use the dominator tree or the call graph?</h4><a class="heading-link" href="#should-i-use-the-dominator-tree-or-the-call-graph" aria-label="Link to 'Should I use the dominator tree or the call graph?' section">#</a></div><p>Use the dominator tree if you want to understand the <em>root</em> cause for why a piece of code is included in your application. Use the call graph if you want to understand all the call paths to and from a piece of code.</p><p>A dominator tree is an analysis or slice of call graph data, where nodes are connected by "dominance" instead of parent-child hierarchy. In the case where a parent node dominates a child, the relationship in the call graph and the dominator tree would be identical, but this is not always the case.</p><p>In the scenario where the call graph is complete (an edge exists between every pair of nodes), the dominator tree would show the that <code>root</code> is the dominator for every node in the graph. This is an example where the call graph would give you a better understanding around why a piece of code is included in your application.</p><div class="header-wrapper"><h2 id="diff-tab">Diff tab</h2><a class="heading-link" href="#diff-tab" aria-label="Link to 'Diff tab' section">#</a></div><p>The diff tab allows you to compare two snapshots of size information. The two size information files you are comparing should be generated from two different versions of the same app; for example, the size file generated before and after changes to your code. You can visualize the difference between the two data sets using the treemap and table.</p><p><img src="/assets/images/docs/tools/devtools/app_size_diff.png" alt="Screenshot of app size diff"></p><div class="header-wrapper"><h3 id="loading-size-files">Loading size files</h3><a class="heading-link" href="#loading-size-files" aria-label="Link to 'Loading size files' section">#</a></div><p>When you open the <strong>Diff</strong> tab, you'll see instructions to load "old" and "new" size files. Again, these files need to be generated from the same application. Drag and drop these files into their respective dialogs, and click <strong>Analyze Diff</strong>.</p><p><img src="/assets/images/docs/tools/devtools/app_size_load_diff.png" alt="Screenshot of app size diff loading screen"></p><p>See <a href="#generating-size-files">Generating size files</a> below for information on generating these files.</p><div class="header-wrapper"><h3 id="treemap-and-table-1">Treemap and table</h3><a class="heading-link" href="#treemap-and-table-1" aria-label="Link to 'Treemap and table' section">#</a></div><p>In the diff view, the treemap and tree table show only data that differs between the two imported size files.</p><p>For questions about using the treemap, see <a href="#use-the-treemap">Use the treemap</a> above.</p><div class="header-wrapper"><h2 id="generating-size-files">Generating size files</h2><a class="heading-link" href="#generating-size-files" aria-label="Link to 'Generating size files' section">#</a></div><p>To use the app size tool, you'll need to generate a Flutter size analysis file. This file contains size information for your entire application (native code, Dart code, assets, fonts, etc.), and you can generate it using the <code>--analyze-size</code> flag:</p><div class="code-block-wrapper language-console"><div class="code-block-body"><pre class="shiki dash-light" tabindex="0"><code><span class="line"><span style="color:#222222">flutter build <your target platform> --analyze-size</span></span></code></pre></div></div><p>This builds your application, prints a size summary to the command line, and prints a line telling you where to find the size analysis file.</p><div class="code-block-wrapper language-console"><div class="code-block-body"><pre class="shiki dash-light" tabindex="0"><code><span class="line"><span style="color:#222222">flutter build apk --analyze-size --target-platform=android-arm64</span></span> <span class="line"><span style="color:#222222">...</span></span> <span class="line"><span style="color:#222222">▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒</span></span> <span class="line"><span style="color:#222222">app-release.apk (total compressed) 6 MB</span></span> <span class="line"><span style="color:#222222">...</span></span> <span class="line"><span style="color:#222222">▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒</span></span> <span class="line"><span style="color:#222222">A summary of your APK analysis can be found at: build/apk-code-size-analysis_01.json</span></span></code></pre></div></div><p>In this example, import the <code>build/apk-code-size-analysis_01.json</code> file into the app size tool to analyze further. For more information, see <a href="/perf/app-size#breaking-down-the-size">App Size Documentation</a>.</p><div class="header-wrapper"><h2 id="other-resources">Other resources</h2><a class="heading-link" href="#other-resources" aria-label="Link to 'Other resources' section">#</a></div><p>To learn how to perform a step-by-step size analysis of the Wonderous App using DevTools, check out the <a href="https://medium.com/@fluttergems/mastering-dart-flutter-devtools-app-size-tool-part-3-of-8-9be6e9ec42a2">App Size Tool tutorial</a>. Various strategies to reduce an app's size are also discussed.</p><p id="page-github-links"><span>Unless stated otherwise, the documentation on this site reflects the latest stable version of Flutter. Page last updated on 2024-06-20.</span> <a href="https://github.com/flutter/website/tree/main/src/content/tools/devtools/app-size.md" target="_blank" rel="noopener">View source</a> <span>or </span><a href="https://github.com/flutter/website/issues/new?template=1_page_issue.yml&&page-url=https://docs.flutter.dev/tools/devtools/app-size/&page-source=https://github.com/flutter/website/tree/main/src/content/tools/devtools/app-size.md" title="Report an issue with this page" target="_blank" rel="noopener">report an issue</a>.</p></div></main></div></div><footer class="site-footer"><div class="container-fluid"><div class="row"><div class="col-md-12 site-footer__wrapper"><div class="site-footer__logo"><img src="/assets/images/branding/flutter/logo/flutter-mono-81x100.png" alt="Flutter Logo" width="81" height="100"></div><div class="site-footer__content"><ul class="site-footer__link-list"><li><a href="/tos">terms</a></li><li><a href="/brand">brand usage</a></li><li><a href="/security">security</a></li><li><a href="https://www.google.com/intl/en/policies/privacy">privacy</a></li><li><a href="https://esflutter.dev/">español</a></li><li><a href="https://flutter.cn" class="text-nowrap">社区中文资源</a></li><li><a href="https://blog.google/inside-google/company-announcements/standing-with-black-community">We stand in solidarity with the Black community. 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