Bio cydia tweak adds a virtual fingerprint scanner for your iPhone4/5/5c/5s or iPad on your lockscreen.
A simple hold on the “Fingerprint Scanner”, while a scan animation occurs, will unlock your device. To make Bio even more realistic, you can add customizable secret step(s) before the scan to prevent others from unlocking. Bio is so convincing, that everyone I have shown this to, truly believes I have a fingerprint reader on my screen. For a personalized touch, the scanner itself can be changed to any image from your photo library.
Bio is iOS7+ compatible and works with or without a passcode on your device. If you cannot purchase this tweak, follow me on twitter or email me instead of stealing.