I don't know that Battery Calibration(sorry I am not able to post an outside link at this time) is a fake app. I have it installed. Though It doesn't really calibrate the battery, it' still monitors the working voltage of battery. So I suppose it's not a total fake app
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?