hot make your android faster and remove the app runing in background with system app

GreenifyGreenify is an app hibernation app, that lets you put apps to sleep when you're not using them. It's basically an automated version of force closing or disabling apps every time you stop using them and then turning them back on when you need them. But doing that manually is a pain. Hence Greenify is one of the best app management apps around.

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•  Greenify makes app management a breeze Oasis FengTo get the full benefits of Greenify you needroot access,and we have guides on how to root your Nexus 5, HTC One M8 and Galaxy S5, among other phones.Just search for your device name and 'factory reset'.Non-rooted users, for example, won't be able to automatically hibernate apps, but can simply flick a widget switch to put your apps to sleep (not a bad fix if you don't want to root your device). If you're serious about managing your background processes, Greenify is the tool you need.