CT UPGRADE is a free-to-use Android application developed by CT App Team. It falls under the category of Utilities & Tools and aims to help users upgrade the version of their band. With this app, users can easily update the firmware of their band and enjoy the latest features and improvements.

The app has a simple and user-friendly interface, making it easy for users to navigate through its features. Additionally, the app provides clear instructions on how to upgrade the band's version, ensuring that even beginners can use it without any difficulty. Overall, CT UPGRADE is a useful tool for anyone who wants to keep their band up-to-date and enjoy the latest features.