Prevent roommates/family members from unlocking your android phone with your fingerprint while you are asleep
Today fingerprint scanners are on almost every phone. It is very handy to have a fingerprint sensor to unlock your device. By the time you pull out a phone from your pocket to your eyes it is already unlocked. It also prevents snooping of your password or pattern from behind your shoulders or through a security camera.
But one place where it fails to hide your sensitive chats and photos from your sneaky roommates or a nosy family member. They can easily use your finger to unlock your phone while you are asleep or too high.