Such apps are usually created to bypass various securities and allow you to change the UI of your device, boost the CPU performance and apply various other changes. (android.gs)
Following an incident in a gym that nearly leaves him in the ground, and various other changes in personal circumstances, Renton returns from Amsterdam, where he has been residing for the last twenty years, to his homeland in Edinburgh. (thehollywoodnews.com)
Finally, here's a list of various other changes made to the Fire Emblem Heroes with this Ver. (perfectly-nintendo.com)