RootSU Checker is a free Android application developed by ByteCode Inc. that allows users to check their device's Super-User root access properties with just a single click. It also displays existing SU files if they were installed before.

The app has a simple and clean user interface that makes it easy to use and understand. It is a fast root checking app that quickly verifies root access properties. With a small size application, it doesn't take up much space on your device.

Please note that RootSU Checker does not root your phone. It is simply a root access checker that is very useful for those who want to check if their device has root access or not.

Overall, RootSU Checker is an excellent utility tool for Android users who want to check their device's root access status. It is a must-have app for those who want to make sure their device is rooted or not.