Rooting with most one-click root programs usually installs other super user apps not SuperSU, some of them being the ones developed by the program developers (KingRoot's KingoSU, for instance).
Now, most Android users prefer SuperSU for too many reasons which some might be based on personal preferences. Because of this, they might feel the need to switch the super user app and its binary files with SuperSU.
Also, lately I got to discover that some of these other super user apps are not able to grant root access to certain apps. A few hours ago, I installed the latest version of Flashfire (developed by Chainfire) on one of my devices and the installed super user app was unable to grant root access to Flashfire. I then replaced all SU files with SuperSU (also property of Chainfire) and it worked just fine.
Note that both SuperSU and Flashfire is owned by Chainfire.
How To Replace Any super user app with SuperSU
- A custom recovery
- Flashable SuperSu - Download
- You already know this guide requires a rooted device, so proceed. Learn how to root your device.
- Download SuperSU from the link above and copy to the root of your device sdcard
- Reboot to recovery
- Select Install Zip, then navigate to where you placed BETA-SuperSU-v2.74-2-20160519174328.zip
- Select the zip and flash it
- Reboot device to system
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