If I were you, I'd uninstall
everything written by Cheetah. They show an abject lack of knowledge of how Android works, so I wouldn't trust them.
For instance, Clean Master, their big app, "cleans" apps "out of RAM" - which is exactly what Android
doesn't want done. (See
Multitasking the Android Way if you want to know why.) They can sell apps, even if the app that's supposed to make your phone run faster actually makes it run slower.
In the 45 years during which I've been writing software, I've
never written an app (or a program) just to make money even if it didn't accomplish what it was supposed to do. (Use an app like
SystemPanelLite to clear apps out of RAM. You'll notice that by the time you've cleared out the third one, Android has reloaded the first one. That's what happens when Clean Master tries to clear all idling apps out - Android keep reopening them. This isn't Windows. that needs as much unused RAM as possible, it's Android, which considers unused RAM to be wasted RAM.)