Whatsapp has added a fingerprint lock for Android users.This new feature provides you with one more layer of security when using the messenger by requiring you to scan your fingerprint before opening the app, even if your phone has already been unlocked.The feature first debuted on iOS devices last February and has now finally made its way to Android. To set up the fingerprint lock feature on your device, first open the Settings menu and locate Account, then under Privacy, select Fingerprint Lock.From here, you will be able to prevent WhatsApp from opening until you scan your fingerprint. However, it notes that you'll still be able to answer calls when the app is locked. It also allows you to choose whether WhatsApp will lock immediately, after one minute, or after 30 minutes.Finally, there is an option to show or hide content in your notifications.WhatsApp is one of the most popular messengers around the world, and one of the features it touts is privacy using end-to-end encryption.By adding Fingerprint lock, it now has one more layer of security to ensure your messages stay between you and the recipient, keeping prying eyes out of your business.