A free app for Android, by ThemeKit.

This application is a tool to customize the appearance of your Android device. It provides a lot of customizable themes, icons, wallpapers, and widgets for your phone. The user interface of the app is easy to understand, so even if you have no previous knowledge of how to work with icons, you will be able to change the appearance of your phone in just a few minutes. You can choose from a wide variety of themes and icons to make your phone unique. This application is free to use, and you can download it for free on Google Play. The app is designed to work with Android devices.