App Updater

A comprehensive Flutter package to check for app updates and display platform-native dialogs. Supports iOS, Android, macOS, Windows, and Linux with adaptive UI for each platform.

Platform	Dialog Style
iOS
Android
macOS
Windows
Linux

Features

Core Features

• Platform-Specific Dialogs: Native UI for each platform (Material, Cupertino, Fluent, Adwaita)
• Persistent Dialogs: Force users to update with non-dismissible dialogs
• Skip Version: Let users skip specific versions
• Do Not Ask Again: Remember user's preference to not show update dialogs
• Custom Endpoints: Support for custom XML/JSON version endpoints

New in v2.0.0

• Release Notes Display: Show what's new in each update
• Update Frequency Control: Only check for updates every X days
• Silent/Background Checking: Check updates periodically without blocking UI
• Force Update by Minimum Version: Define minimum required version to force updates
• Analytics/Callbacks: Track update impressions, dismissals, and completions
• TestFlight Support: Support beta updates via TestFlight on iOS
• GitHub Releases Support: Check for updates from GitHub releases
• Firebase Remote Config: Integrate with Firebase for remote version control
• Localization/i18n: Built-in translations for dialog text
• Update Urgency Levels: Critical, high, medium, low update types
• Changelog Fetching: Auto-fetch and display changelogs from stores

Supported Platforms

Platform	Store	Dialog Style
iOS	App Store	Cupertino
Android	Play Store	Material Design 3
macOS	Mac App Store	Cupertino
Windows	Microsoft Store	Fluent Design
Linux	Snap Store / Flathub	Adwaita (GNOME)

Installation

Add app_updater to your pubspec.yaml:

dependencies:
  app_updater: ^2.0.0

Quick Start

import 'package:app_updater/app_updater.dart';

// Create an AppUpdater instance
final appUpdater = AppUpdater.configure(
  iosAppId: '123456789',
  macAppId: '987654321',
  microsoftProductId: '9NBLGGH4NNS1',
  snapName: 'my-app',
  flathubAppId: 'com.example.myapp',
);

// Check for updates and show dialog
final updateInfo = await appUpdater.checkAndShowUpdateDialog(context);

if (updateInfo.updateAvailable) {
  print('New version available: ${updateInfo.latestVersion}');
  print('Release notes: ${updateInfo.releaseNotes}');
}

Usage

Basic Usage

// Create AppUpdater with configuration
final appUpdater = AppUpdater.configure(
  iosAppId: '123456789',
  // androidPackageName is auto-detected!
);

// Check and show dialog if update available
await appUpdater.checkAndShowUpdateDialog(context);

All Platforms

final appUpdater = AppUpdater.configure(
  // Mobile
  iosAppId: '123456789',
  androidPackageName: 'com.example.app', // Optional - auto-detected
  // Desktop
  macAppId: '987654321',
  microsoftProductId: '9NBLGGH4NNS1',
  snapName: 'my-app',
  flathubAppId: 'com.example.myapp',
  linuxStoreType: LinuxStoreType.snap, // or LinuxStoreType.flathub
);

Dialog Styles

The package provides 5 dialog styles that match each platform's design language:

await appUpdater.showUpdateDialog(
  context,
  dialogStyle: UpdateDialogStyle.adaptive, // Auto-selects based on platform
);

// Or force a specific style:
// UpdateDialogStyle.material   - Material Design 3 (Android)
// UpdateDialogStyle.cupertino  - iOS/macOS native
// UpdateDialogStyle.fluent     - Windows Fluent Design
// UpdateDialogStyle.adwaita    - Linux GNOME/Adwaita

Persistent (Forced) Updates

For critical updates that users must install:

await appUpdater.checkAndShowUpdateDialog(
  context,
  isPersistent: true,  // Cannot be dismissed
  isDismissible: false,
  title: 'Critical Update Required',
  message: 'Please update to continue using the app.',
);

Skip Version & Do Not Ask Again

Let users control update notifications:

await appUpdater.checkAndShowUpdateDialog(
  context,
  showSkipVersion: true,    // Shows "Skip this version" option
  showDoNotAskAgain: true,  // Shows "Don't remind me again" option
);

Managing Preferences

// Check if user skipped a version
final isSkipped = await UpdatePreferences.isVersionSkipped('2.0.0');

// Check if user chose "do not ask again"
final doNotAsk = await UpdatePreferences.isDoNotAskAgain();

// Reset all preferences
await UpdatePreferences.clearAll();

// Reset only skipped version
await UpdatePreferences.clearSkippedVersion();

// Get analytics data
final impressions = await UpdatePreferences.getUpdateImpressions();
final dismissals = await UpdatePreferences.getUpdateDismissals();

---

New Features

Release Notes Display

Show what's new in the update dialog:

await appUpdater.checkAndShowUpdateDialog(
  context,
  showReleaseNotes: true, // Enabled by default
);

// Release notes are automatically fetched from:
// - App Store (iOS/macOS)
// - Flathub (Linux)
// - GitHub Releases
// - Custom JSON/XML endpoints

Update Frequency Control

Prevent checking for updates too frequently:

final appUpdater = AppUpdater.configure(
  iosAppId: '123456789',
  checkFrequency: Duration(days: 1), // Only check once per day
);

// Manual check respecting frequency
final updateInfo = await appUpdater.checkForUpdate();

// Force check ignoring frequency
final updateInfo = await appUpdater.checkForUpdate(respectFrequency: false);

Background/Silent Checking

Check for updates in the background without blocking the UI:

// Start periodic background checking
appUpdater.startBackgroundChecking(Duration(hours: 6));

// Listen for updates
appUpdater.updateStream.listen((updateInfo) {
  if (updateInfo.updateAvailable) {
    // Show notification or update badge
    showNotification('Update available: ${updateInfo.latestVersion}');
  }
});

// Stop background checking when done
appUpdater.stopBackgroundChecking();

// Don't forget to dispose
@override
void dispose() {
  appUpdater.dispose();
  super.dispose();
}

Force Update by Minimum Version

Force updates when users are below a minimum version:

final appUpdater = AppUpdater.configure(
  iosAppId: '123456789',
  minimumVersion: '2.0.0', // Users below this MUST update
);

// Or via custom JSON endpoint:
// { "version": "2.5.0", "minimumVersion": "2.0.0" }

// Check if force update is required
final updateInfo = await appUpdater.checkForUpdate();
if (updateInfo.requiresForceUpdate) {
  // Show non-dismissible dialog
  await appUpdater.showUpdateDialog(context, isPersistent: true);
}

Update Urgency Levels

Communicate update importance to users:

// Urgency levels: low, medium, high, critical
// Set via custom endpoints or Firebase Remote Config

// Custom JSON endpoint example:
// { "version": "2.5.0", "urgency": "critical" }

// The dialog icon and color change based on urgency
final updateInfo = await appUpdater.checkForUpdate();
print('Urgency: ${updateInfo.urgency}'); // UpdateUrgency.critical

Analytics & Callbacks

Track user interactions with update dialogs:

final appUpdater = AppUpdater.configure(
  iosAppId: '123456789',
  onAnalyticsEvent: (event) {
    // Send to your analytics service
    analytics.logEvent(
      name: event.eventName,
      parameters: event.toMap(),
    );
  },
);

// Available events:
// - update_dialog_shown
// - update_accepted
// - update_declined
// - update_version_skipped
// - update_do_not_ask_again
// - update_check_started
// - update_check_completed
// - update_check_failed
// - update_store_opened

GitHub Releases Support

Check for updates from GitHub releases:

final appUpdater = AppUpdater.configure(
  githubOwner: 'mycompany',
  githubRepo: 'myapp',
  githubIncludePrereleases: false, // Set to true for beta builds
);

// Automatically fetches:
// - Latest version from tag name
// - Release notes from body
// - Download URL from assets

TestFlight Support (iOS)

Support beta updates via TestFlight:

final appUpdater = AppUpdater.configure(
  iosAppId: '123456789',
  testFlightEnabled: true,
  testFlightUrl: 'https://testflight.apple.com/join/ABC123', // Optional custom URL
);

// Open TestFlight for beta testing
await appUpdater.openTestFlight();

Firebase Remote Config Integration

Use Firebase Remote Config for dynamic version control:

final appUpdater = AppUpdater.configure(
  firebaseRemoteConfigEnabled: true,
  firebaseSettings: FirebaseRemoteConfigSettings(
    minimumVersionKey: 'minimum_app_version',
    latestVersionKey: 'latest_app_version',
    updateUrlKey: 'app_update_url',
    releaseNotesKey: 'release_notes',
    urgencyKey: 'update_urgency',
    mandatoryKey: 'mandatory_update',
  ),
  firebaseConfigFetcher: () async {
    // Fetch from your Firebase Remote Config instance
    await FirebaseRemoteConfig.instance.fetchAndActivate();
    return {
      'minimum_app_version': FirebaseRemoteConfig.instance.getString('minimum_app_version'),
      'latest_app_version': FirebaseRemoteConfig.instance.getString('latest_app_version'),
      'app_update_url': FirebaseRemoteConfig.instance.getString('app_update_url'),
      'release_notes': FirebaseRemoteConfig.instance.getString('release_notes'),
      'update_urgency': FirebaseRemoteConfig.instance.getString('update_urgency'),
      'mandatory_update': FirebaseRemoteConfig.instance.getBool('mandatory_update'),
    };
  },
);

Localization / i18n

Provide translations for all dialog text:

// Create localized strings
final frenchStrings = UpdateStrings(
  updateAvailableTitle: 'Mise à jour disponible',
  updateAvailableMessage: 'Une nouvelle version ({latestVersion}) est disponible. Vous avez actuellement la version {currentVersion}.',
  updateButton: 'Mettre à jour',
  laterButton: 'Plus tard',
  skipVersionButton: 'Ignorer cette version',
  doNotAskAgainButton: 'Ne plus me rappeler',
  criticalUpdateTitle: 'Mise à jour critique requise',
  criticalUpdateMessage: 'Cette mise à jour contient des correctifs importants.',
  releaseNotesTitle: 'Nouveautés',
  loadingText: 'Vérification des mises à jour...',
  errorText: 'Impossible de vérifier les mises à jour',
  upToDateText: 'Votre application est à jour !',
);

final appUpdater = AppUpdater.configure(
  iosAppId: '123456789',
  strings: frenchStrings,
);

---

Custom Update Servers

Custom JSON Endpoint

Host your own version endpoint:

{
  "version": "2.0.0",
  "url": "https://example.com/download",
  "releaseNotes": "- New feature X\n- Bug fix Y",
  "minimumVersion": "1.5.0",
  "urgency": "high",
  "mandatory": false
}

final appUpdater = AppUpdater.configure(
  customJsonUrl: 'https://example.com/version.json',
);

Custom XML Endpoint

<?xml version="1.0" encoding="UTF-8"?>
<app>
  <version>2.0.0</version>
  <url>https://example.com/download</url>
  <releaseNotes>New features and improvements</releaseNotes>
  <minimumVersion>1.5.0</minimumVersion>
  <urgency>high</urgency>
  <mandatory>false</mandatory>
</app>

final appUpdater = AppUpdater.configure(
  customXmlUrl: 'https://example.com/version.xml',
);

---

Additional Methods

Check Without Dialog

final updateInfo = await appUpdater.checkForUpdate();

print('Current: ${updateInfo.currentVersion}');
print('Latest: ${updateInfo.latestVersion}');
print('Update available: ${updateInfo.updateAvailable}');
print('Store URL: ${updateInfo.updateUrl}');
print('Release notes: ${updateInfo.releaseNotes}');
print('Urgency: ${updateInfo.urgency}');
print('Is mandatory: ${updateInfo.isMandatory}');
print('Requires force update: ${updateInfo.requiresForceUpdate}');
print('Update size: ${updateInfo.formattedUpdateSize}');

Open Store

// Open the appropriate store for the current platform
await appUpdater.openStore();

// Or use the convenience function
await openAppStore(
  iosAppId: '123456789',
  microsoftProductId: '9NBLGGH4NNS1',
);

Callbacks

await appUpdater.checkAndShowUpdateDialog(
  context,
  onNoUpdate: () {
    ScaffoldMessenger.of(context).showSnackBar(
      const SnackBar(content: Text('App is up to date!')),
    );
  },
  onUpdate: () {
    print('User chose to update');
  },
  onCancel: () {
    print('User cancelled');
  },
);

Custom Dialog

await appUpdater.showUpdateDialog(
  context,
  customDialog: AlertDialog(
    title: const Text('Custom Update Dialog'),
    content: const Text('A new version is available!'),
    actions: [
      TextButton(
        onPressed: () => Navigator.pop(context),
        child: const Text('Later'),
      ),
      FilledButton(
        onPressed: () {
          Navigator.pop(context);
          appUpdater.openStore();
        },
        child: const Text('Update'),
      ),
    ],
  ),
);

---

API Reference

AppUpdater

Method	Description
AppUpdater.configure(...)	Create instance with individual parameters
AppUpdater(config)	Create instance with AppUpdaterConfig
checkForUpdate()	Check for updates, returns UpdateInfo
showUpdateDialog(context, ...)	Show update dialog
checkAndShowUpdateDialog(context, ...)	Check and show dialog if update available
openStore()	Open the appropriate app store
openTestFlight()	Open TestFlight (iOS only)
getStoreUrl()	Get store URL for current platform
getTestFlightUrl()	Get TestFlight URL (iOS only)
startBackgroundChecking(interval)	Start periodic background checks
stopBackgroundChecking()	Stop background checks
performBackgroundCheck()	Perform single background check
dispose()	Clean up resources

AppUpdaterConfig

Parameter	Type	Description
iosAppId	String?	iOS App Store app ID
macAppId	String?	macOS App Store app ID
androidPackageName	String?	Android package name (auto-detected)
microsoftProductId	String?	Microsoft Store product ID
snapName	String?	Snap Store package name
flathubAppId	String?	Flathub app ID
customXmlUrl	String?	Custom XML endpoint URL
customJsonUrl	String?	Custom JSON endpoint URL
linuxStoreType	LinuxStoreType	snap or flathub
githubOwner	String?	GitHub repository owner
githubRepo	String?	GitHub repository name
githubIncludePrereleases	bool	Include prereleases (default: false)
testFlightEnabled	bool	Enable TestFlight (default: false)
testFlightUrl	String?	Custom TestFlight URL
firebaseRemoteConfigEnabled	bool	Enable Firebase (default: false)
firebaseSettings	FirebaseRemoteConfigSettings?	Firebase config keys
firebaseConfigFetcher	Function?	Callback to fetch Firebase values
checkFrequency	Duration?	Minimum time between checks
minimumVersion	String?	Minimum required version
onAnalyticsEvent	Function?	Analytics callback
strings	UpdateStrings	Localized strings

UpdateDialogStyle

Style	Platform	Description
adaptive	All	Auto-selects based on platform
material	Android	Material Design 3
cupertino	iOS/macOS	Native Apple design
fluent	Windows	Microsoft Fluent Design
adwaita	Linux	GNOME/Adwaita style

UpdateUrgency

Level	Description
low	Minor improvements, can be skipped
medium	Regular updates with new features
high	Important updates, strongly recommended
critical	Security fixes or breaking changes

UpdateInfo

Property	Type	Description
currentVersion	String	Current app version
latestVersion	String?	Latest available version
updateUrl	String?	Store/download URL
updateAvailable	bool	Whether update is available
releaseNotes	String?	Release notes/changelog
urgency	UpdateUrgency	Update urgency level
minimumVersion	String?	Minimum required version
isMandatory	bool	Whether update is mandatory
releaseDate	DateTime?	Release date
updateSizeBytes	int?	Update size in bytes
requiresForceUpdate	bool	Whether force update is required
formattedUpdateSize	String?	Human-readable size (e.g., "15.2 MB")

UpdatePreferences

Method	Description
isVersionSkipped(version)	Check if version is skipped
skipVersion(version)	Skip a specific version
isDoNotAskAgain()	Check "do not ask again" preference
setDoNotAskAgain(value)	Set "do not ask again" preference
getLastCheckTime()	Get last update check time
setLastCheckTime(time)	Set last update check time
shouldCheckForUpdate(frequency)	Check if enough time has passed
getUpdateImpressions()	Get dialog impression count
getUpdateDismissals()	Get dismissal count
clearAll()	Clear all preferences
clearSkippedVersion()	Clear skipped version only

UpdateAnalyticsEvent

Property	Type	Description
eventName	String	Event name
currentVersion	String	Current app version
latestVersion	String?	Latest available version
urgency	UpdateUrgency?	Update urgency
platform	String	Platform name
timestamp	DateTime	Event timestamp
toMap()	Map	Convert to map for analytics

UpdateStrings

Property	Type	Description
updateAvailableTitle	String	Dialog title
updateAvailableMessage	String	Dialog message (supports placeholders)
updateButton	String	Update button text
laterButton	String	Later button text
skipVersionButton	String	Skip version button text
doNotAskAgainButton	String	Do not ask again button text
criticalUpdateTitle	String	Critical update title
criticalUpdateMessage	String	Critical update message
releaseNotesTitle	String	Release notes section title
loadingText	String	Loading text
errorText	String	Error text
upToDateText	String	Up to date text

---

Notes

• Update dialogs won't work on iOS Simulator (no App Store)
• Android package name is auto-detected if not provided
• Custom endpoints take priority over store checks
• Firebase Remote Config takes highest priority when enabled
• GitHub releases are checked before platform stores
• Release notes are automatically fetched from supported sources
• Background checking requires calling dispose() when done

Credits

• url_launcher
• package_info_plus
• shared_preferences

Author

• Mantresh Khurana