Basically, we use authentication method like a password or pincode to lock the apps.
Enter AppLock -Fingerprint-, which gives you access to those apps by using the fingerprint scanner.
This app will lock and secure your apps that only you’re free to unlock using your fingerprint.
The app looks quite nice with its Material Design UI.
Further, the good news is that the app is free.
If you wish to get your hands on AppLock, go to Google Play Store for thedownload.
source: www.techworm.net