Most of the fingerprint lock apps are make for fun but ICE Unlock Fingerprint is original fingerprint unlock. It use fingerprint for unlock device. You can take finger print images from your existing camera. No additional hardware or scanner needed. ICE Unlock requires a rear-facing camera with flash, and the camera has to be able to focus on your finger. If you can’t focus your finger do not work with ICE Unlock.
You can simply install ICE Unlock on your phone after the installation capture the images of fingerprint. Pictures of your finger are turned into a template. The template is stored in secure storage area of device. This template is used for ICE Unlock. It requires Android 4.0 and more.