Clean master is one of the worst app with 100million downloads on playstore, clean master is one of the app which consumes ram and makes the devices slow I didnt see any improvment after installing the app on my mobile, the app looks good whats the use of the car which have looks but it doesnt work its the same case with clean master and it does have some functions like clear cache, duplicate files cleaner and other stuff which are useless, this app is not usefull at all it is has lots of advertisment which slows your phone and consumes your precious data guys do not install this type of apps they dont work in real life they are just made for putting the customer in fraud