The application is named 'Theme for Xiaomi MI 5X' and it's not an official Xiaomi product, but it's made by a group of Android enthusiasts who love Xiaomi smartphones and want to give them a new look and feel.

The new theme is based on the latest version of the Android operating system. It has been optimized for the most common screen sizes, including small, medium, and large screens. It also supports portrait screens and both landscape and portrait screens.

The theme is easy to use and is very easy to install. It doesn't require any root or other special permissions.

You will be able to change the theme from the settings menu of the application.