WhatsApp Chat Lock adds extra privacy by securing individual chats with fingerprint, Face ID, or PIN on Android and iPhone.

To lock WhatsApp on Android, launch the app, tap the three-dot menu, navigate to Settings > Privacy > App Lock, and turn on "Unlock With Biometric." To lock WhatsApp ...

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Google is working on a native App Lock feature, and it could arrive as early as Android 17 next year. Here's how it might work!