This application is only for phones that are supported by KCal and KPPD.

KCal is a post processing color calibration for select chip sets in mobile phones and tablets that allows you to change the way your screen displays i.e. contrast saturation color etc. To see if your phone or tablet is supported please see this XDA thread by the kppd creator Savoca:

https://forum.xda-developers.com/g4/orig-development/kppd-configure-post-processing-settings-t3165247

Sovaca's work in color calibration is really great. What this app allows you to do is manage installation and control of the kpp daemon without having to use the terminal or adb commands.

This app does require root permission!