Any Third Party Applications that will interfere with the normal operation of the OS, is an invitation for disaster and comprising the Operating System
Certain Applications maybe available on the Apple Apps Store - this only means the Developer is prepared to pay Apple a portion on each sale. What the Application may do to the computer is up to the User to check this out before purchase
Any of the below should be removed as per Developers Instructions
This will include CleanMyMac
Read some of the posting and arrive at your own conclusions
From observations only, even after removing CMM as per developers Instructions it may or may not require Reinstallation of the OS via Recovery mode
That may to put things right again after the possible damages inflicted on the computer by CMM