Use APKPure App
Get Device Full Control (Root) old version APK for Android
Even lets you tune/control your CPU and GPU, see kernel info, flash, modify etc.
Puts you in control your phone: displays all detailed information about it, it has a cpu/gpu tuner, a flasher function, an app manager (system), a boot manager, a temp monitor and much more to come!
It even allows you to change some kernel and VM related settings and parameters.
About app:
App is meant as a custom version of DeviceControl, Copyright (C) 2013 - 2016 Alexander Martinz, under the GNU GPL v3 open-source license
All information regarding this app, licensing and copyright as well as many other details available here:
https://github.com/Romascu/FullDeviceControl-Custom