RedGreen (Superb Clean Master), a Finalist at CTIA Tech Awards 2016! Being the best Android Optimizer will help you reclaim storage space by the key features like App Manager, Speed Booster, Junk Cleaner, App Lock, Battery Saver & DataSecurity, Android Cleaner, Facebook optimizer.
It's free to get the installation package of RedGreen, also, you can take a look at users' reviews on Droid Informer. The app works fine on Android 5.0 and higher. This application is totally secure for downloading. UnfoldLabs Inc., has designed RedGreen that lies within the Tools category.