Substratum Rounded UI OreoNougat Theme is a free app for Android devices that can be used as a theme for your smartphone. The app is a collaboration between the developers of the Android operating system and the software company Substratum.

The aim of this app is to give your smartphone a unique look and to make it more personal.

To do this, the developers have created a new theme that can be applied to your device. It is a combination of a new UI design and the existing Android operating system.

This new theme can be applied to any Android device that is running the latest version of the operating system.

It is an application that can be downloaded onto your device and used as a theme for your smartphone.