Biometric verification can be used not only for mobile operating systems, but also for their applications. You can protect your banking or cloud applications with your fingerprint or face scan. Facebook is also preparing a similar feature.
As the alleged first screenshots of the beta version of Messenger reveal, Facebook intends to use Apple’s Face ID technology to secure the application; that is, he will not have access to the user’s face at all. In the settings, you can choose when Messenger should “lock”.
We do not yet know if Facebook is preparing a similar service for Android devices where it would use a fingerprint reader.