Once Screen Lock is enabled, every time you open WhatsApp, the app will require Face ID or Touch ID to unlock, otherwise, you won't be able to use. The feature is available for WhatsApp iOS version 2.19.20 and users can update their app to use it.
WhatsApp is among the most popular messaging service in the world. The latest update to WhatsApp for iOS brings support for locking and unlocking the application through Face ID and Touch ID.
Notably, Mashable's own Ray Wong recently got the ability to use Face ID with his iOS Instagram app; Instagram confirmed to us they're testing the feature.
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"The feature is now only on the iOS app, and adds a new feature to the Privacy menu in users" settings. A fingerprint authentication feature appears to be under development for Android and it could be released in the coming update.
WhatsApp didn't immediately respond to a request for information about any new security for the Android version of the app.
WhatsApp users with iPhones can now add an extra layer of security on the instant messaging application. Messages will still be partially visible via notifications, and they can still be quick-replied to. This mean despite having the lock on, you will still be able to see the messages in the notifications, if turned on. You can also select the lock timing accordingly.