Is CleanMyMac software safe to use on Apple devices?

Any Third Party Applications that will interfere with the normal operation of the OS, alter, modify, remove or delete or attempt to do so is an invitation for disaster and may require a Reinstallation of the OS.

And CMM ( Clean My Mac ) is defiantly in this category

I hear it's improved, but for many it ends up being a problem...

On CMM…

https://discussions.apple.com/thread/251370955?answerId=252661013022#252661013022

https://discussions.apple.com/thread/251442443?answerId=252814053022#252814053022

https://discussions.apple.com/thread/251464557?answerId=252841819022#252841819022

https://discussions.apple.com/thread/251889446?answerId=253629452022#253629452022

no