If you like high sensitivity, you will like to use this app, because it makes the screen faster, to help people who are unable to upload a cover in the game, or for those who have a cell phone that does not have the DPI function (smaller width) .
In addition, the FF has less lag, precisely to improve the performance of inferior devices.
Finally, there's a tool that aims to show you various settings that you can test on your Android device, to give your gameplay an "up".