How to unroot automatically rooted mobile? My question is ambiguous because I am new for Android and I have no idea about how to root Android. But my phone suddenly say rooted device.
Actually I was not try to my phone make root. Or never try to run any super user command as per my knowledge.
My question is:


It is possible that smartphone can be automatically root itself by just installing app.
How to check root. how to unroot?


Why my phone say it's rooted device?

here is link of wifive https://play.google.com/store/apps/details?id=com.wifiveapp.hotspot.wifi
Here is screenshot of device:

 
Screenshots: root checker status, my device (click images to enlarge)
1- Yes, some malicious Apps (even on google play) may use exploits to root your device and gain super privileges.

2-If you want to check root, you may use apps like root checker as you did or you can search for su binaries in system paths.

3-If you want to fully unroot your device my advice is to use supersu app and let it unroot your device or you may want to flash your device with stock ROM.

But flashing even with stock ROM may result in voiding warranty if you are not familiar with the process.

To be in the safe side, If you're sure that your device is rooted, you can simply unroot it with SuperSU application and check to see if the device is completely unrooted.