Greening is an app which allows users to increase their phone's battery life up to 50%. By the use of this app, the users can disable those unnecessary apps which keep running in the background and eat up your data and battery. Since we download many such apps which we don't use daily, it's recommended to keep all those apps on hibernation. For example, I have UC browser installed in my phone and I keep it on hibernation, which means it will only wake up and use my data and battery when I open it manually. This app works best with rooted phone. If you want to download this app, head over to playstore and search for Greenify. Good luck!