Finger Print is currently only offered on iOS devices. This feature is not available at this time on other Passwords Plus platforms.
To setup Touch ID for passwords plus all you need to do is already have your Touch ID setup for your iOS device. After you do this open passwords plus, tap on the three dots in the top right corner, tap on settings, scroll down to select Touch ID. Then turn Touch ID on if it is off. Then you will be able to sign in with Touch ID. Just make sure that you don’t forget your Master Password because you will still need to use your Master Password every few days to sign in to Passwords Plus.
If you are having trouble using Touch ID and are putting your finger on the fingerprint on the screen, you need to put your finger on the actual HOME button to open Passwords Plus, not on the picture of the fingerprint on the screen. This is the place you put your finger to unlock your phone.