Security Master(Cheetah) has removed caller ID&Block from the app. Explanation was Google Play's TOS no longer allows it.
What does GP have to do with some apps not owned or developed by it? Why would they care, unless they are pushing their own caller ID apps.
Anyway, SM seems to take up too much space, and do whatever other apps do, so I decided I no longer need it.
Actually, it wouldn't be shocking if they were made to remove it. It would have nothing to do with GP making their own, but could be due to the app not complying with the sites requirements/restrictions. Lots of apps are being removed for this. Especially ones that are accessing data they shouldn't.
You can try the following....
NOTE: I am only listing ones that are supposed to have no ads or in app purchases.