UI Privacy

Prevent sensitive UI from being captured in screenshots, screen recordings, or the OS app switcher preview.

Usage

import { preventScreenshot } from '@think-grid-labs/react-native-shield';

// Enable — call when entering a sensitive screen
await preventScreenshot(true);

// Disable — call when leaving the sensitive context
await preventScreenshot(false);

Platform behavior

	Android	iOS
Screenshot	Blocked via FLAG_SECURE	Not blockable (OS limitation)
Screen recording	Blocked via FLAG_SECURE	Content masked via UITextField.secureTextEntry layer
App switcher preview	Replaced with blank screen	Blur overlay on WillResignActive

iOS limitation: Hardware screenshots (Home + Power) cannot be blocked by any third-party app. preventScreenshot protects against screen recording, AirPlay mirroring, and the app switcher preview.

Use cases

• Banking / wallet apps — enable on balance screens and transfer confirmations
• Password managers — enable globally; users cannot screenshot their vault
• Healthcare — prevent patient data from appearing in OS recent-apps thumbnails
• Chat apps — enable on message screens to block screen recording