WhatsApp for Android Comes with new feature unlock app with finger print.

WhatsApp is well known message app for everyone owned by Facebook. It became very popular day by day for it's simple features and easy way to message. Added one more feather in the cap by adding new feature named Fingerprint Lock. Right now this feature only available in beta version v2.19.221 for Android app users. Users can simply unlock app with their finger print as they previously unlock their phone.
Here are steps to enable this feature beta users.
Go to Settings->Account->Privacy->Fingerprint Lock and turn on the toggle button that's it.