Root Checker Pro: Free

Root Checker Pro: Free is a tiny tool which lets you quickly and easily check whether your device has root access. In my root checker app, you'd be notified of a root access by the use of tick/cross images.

What do you mean by Rooting/Root Access?

Rooting is the process of allowing users of smartphones, tablets and other devices running the Android mobile operating system to attain privileged control (known as root access) over various Android subsystems. As Android uses the Linux kernel, rooting an Android device gives similar access to administrative (superuser) permissions as on Linux or any other Unix-like operating system.Your device will have enhanced privileges allowing it to run a lot more apps. In other words, your device can run sudo command.

Rooting is often performed with the goal of overcoming limitations that hardware manufacturers put on some devices. Thus, rooting gives the ability (or permission) to alter or replace system applications and settings, run specialized applications ("apps") that require administrator-level permissions, or perform other operations that are otherwise inaccessible to a normal Android user. On Android, rooting can also facilitate the complete removal and replacement of the device's operating system, usually with a more recent release of its current operating system.

✔ -> You have root access, Congratulations!

✘ -> Sorry, you do not have root access!

If you get a superuser popup, select grant. I hope Root Checker Pro: Free helps you.

Note:
This app won't ROOT your phone, it just will verify your root access status.