A free program for Android, by k9120303.
This is a lock screen app that requires root. It is designed to be easy to use and very fast. There are several different themes you can choose from, and you can change them according to your preference.
It supports several different methods of unlocking, including the fingerprint sensor and the password, as well as the voice recognition and the code. You can set a pin, a pattern, or a password to unlock your phone in a safer way.
This app does not use the battery or the phone's storage. It is designed to be very fast and save the battery.
