GREENIFY



You can use this app to kill background running processes and apps of android very easily with or without rooting the device.

It will help you to boost your phone performance.

It help you identify and put the misbehaving apps into hibernation when
you are not actively using them, to stop them from lagging your device or leeching the battery, in a unique way! They can do nothing without explicit launch by you or other apps, while still preserving full functionality when running in foreground.

It can hibernate your system apps too but you will have to buy the donation package from google play store.
Or you can get it from me at half price $0.36 on play store via email or other means.
But I will recommend you to buy legally through google. But if you want to save money then it doesn't matters.

So stop the apps that runs in background without any trace and sends your private data through their servers and put them to sleep.