Facebook - owned WhatsApp is reportedly working on a fingerprint authentication feature to protect its users' chats from being seen by others.
According to WABetaInfo, a fan site that tests new WhatsApp features early, the feature is current under development in Beta for Android 2. 19. 3 version.
"After working to implement Face ID and Touch ID features on iOS (that aren't available yet for development reasons).
WhatsApp has finally started to work on the Authentication feature on iOS (that aren't available yet for development reasons).
WhatsApp has finally started to work on the Authentication feature on Android, using your Fingerprint!"