Saved my battery many times over! An essential app if you want to keep an eye on your battery usage and you're technical enough to understand it. Well  you don't really need to be a hacker to use this  but it sure helps to have some technical knowledge so that you may use the information this wonderful app gives: with this information I could track down processes that were keeping my phone in wakelocks and drastically improved my batter life. Thank you! :). Also  please make a paid version. I wanna pay :D.
July 08 2014