WhatsApp on iOS can now be locked behind Face ID or Touch ID

Depending on what iPhone model you have, you can now use either Face ID or Touch ID to restrict access to your WhatsApp. If you have the newest version (ver. 2.19.20) of the app, this feature can be activated from its Privacy menu within the Account Settings. You can’t set it on a per-chat basis, though. Also, if you have message previews turned on, you’ll still be able to see and reply to messages without having to unlock the app. You can also answer calls. But if you want to dive deeper into the app, you’re going to need to unlock it with either Face ID or Touch ID. There isn’t any word yet when the feature might make its way to Android.

Source: The Verge