flutter_screenshot_guard

Screenshot and screen recording guard for Flutter apps.
Essential for banking, wallet, password manager, and other fintech apps that must prevent screenshots, screen recording, and visible content in the app switcher.

Features

Feature	Android	iOS
Disable screenshots	✅ FLAG_SECURE	⚠️ Blur overlay when recording/background
Disable screen recording	✅ FLAG_SECURE	✅ Blur overlay when capture is active
Blur app when in background	✅ Dim overlay in recents	✅ Blur overlay in app switcher

• Android: Uses WindowManager.LayoutParams.FLAG_SECURE to block screenshots and screen recording system-wide.
• iOS: Screenshots cannot be fully disabled by the system. The plugin shows a blur overlay when the app is backgrounded or when screen capture/recording is detected (iOS 11+), so sensitive content is never visible in the app switcher or in recordings.

Installation

Add to your pubspec.yaml:

dependencies:
  flutter_screenshot_guard: ^1.0.0

Then run:

flutter pub get

Usage

Enable all protections (recommended for fintech)

import 'package:flutter_screenshot_guard/flutter_screenshot_guard.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await FlutterScreenshotGuard.enableSecureMode();
  runApp(MyApp());
}

Enable / disable individually

// Block screenshots and screen recording (Android: FLAG_SECURE; iOS: blur when recording)
await FlutterScreenshotGuard.enableScreenshotBlocking();
await FlutterScreenshotGuard.disableScreenshotBlocking();

// Blur app when in background (app switcher / recents)
await FlutterScreenshotGuard.enableBlurOnBackground();
await FlutterScreenshotGuard.disableBlurOnBackground();

Optional: blur intensity

When using blur on background, you can set intensity (0.0–1.0, default 0.5):

await FlutterScreenshotGuard.setBlurIntensity(0.7);

Use cases

• Banking apps – Protect account and balance from screenshots and shoulder surfing.
• Wallet / crypto apps – Keep keys and balances private in recents and recordings.
• Password managers – Prevent passwords from appearing in app switcher or screen capture.

Platform details

Android

• minSdk: 24
• Screenshot and screen recording are disabled via FLAG_SECURE.
• Background blur is a semi-transparent overlay shown when the app is in recents.

iOS

• iOS 11+ for screen capture detection (UIScreen.isCaptured).
• iOS 13+ recommended for key window resolution.
• Blur overlay is shown when the app goes to background or when screen capture/recording is active.

Example

See the example/ app for a full demo with toggles for each feature and simulated sensitive data.

cd example && flutter run

License

See LICENSE for details.