Uninstalled App Pop Up Message Error

[RMongrel]

I had installed 360 battery plus onto my note 7, only to keep getting unfortunately the app has stopped working. I then uninstall and now the same pop up message still shows up whenever i restart my phone. Have tried reinstall and uninstall again but the pop up window still shows.

Please advise if there's any way i can stop it.

Thanks so much.

 

[Guerde]

Try reinstalling the app then clear the data then uninstall again.