A free program for Android, by Ear Swift.

Color Call Screen Color Call is a free, colorful and elegant caller screen theme. It is an easy-to-use application that lets you customize your phone call screen with new themes. The app contains various themes, from the simplest ones to the most complex and colorful ones. All themes are designed to be used for incoming calls. The Phone Caller Screen can also be used to set various ringtones for individual contacts or all contacts. It is a powerful and easy-to-use application that lets you use different ringtones for individual contacts or all contacts. It is a very simple and easy-to-use application that lets you customize your phone call screen with new themes and ringtones.