A free app for Android, by AndroPicsa.

The Caller Screen Changer app allows you to make your caller screen more colorful by changing the background and font color. With the color phone flash option, the app will also alert you with a flashing light when you receive a call.

There are many themes to choose from in the app, and you can select the one you like best and set it as the default theme for all incoming and outgoing calls.

This app is perfect for users who like to have more fun when they are on the phone. It can also be used for users who want to make a prank call to their friends or family.