A free program for Android, by Green Banana Studio.

This app is a must-have tool that will protect your device from intruders and other unauthorized users. The screen will be a beautiful image that will make the device look amazing. This app has been carefully designed to provide a high level of security and to make it very difficult for anyone to unlock your phone without your permission.

This application is a very simple and easy-to-use tool that does not require any sort of training to use. You will not need to write down any sort of code; you just need to touch the screen to start the application.