Here's how you can download the free SuperSU app for Android. SuperSU gives you advanced management of superuser access on your Android devices.
SuperSU offers a superuser access prompt, and superuser access logs. You also get access notifications, temporary unroot capabilities, and deep process detection (among other things).
Download and Install SuperSU for Android
1. Go to the Google Play page for SuperSU.
2. Tap the Install button.