Clean Master is an app which says that it makes the phone faster by clearing the unwanted junk files and and makes phone in its best state. But it is quite ironical to what it do.I had been attracted by the ads on my phone by different apps and downloaded it.
But after downloading it started showing frequent notifications to clean your phone. After cleaning the phone nothing happens to my system instead it makes the apps slow to respond and gives a lot of ads covering my phone. I would recommend that you should not download it.It is just a wasteful app.