I think clipboard permissions for applications is going to become an issue with features like this. I may be incorrect but I'm pretty sure that clipboard access is unrestricted on both OS X (ugh, macOS) and iOS.
…which is why (in my opinion) macOS ('Mac Operating System') is far better than what it’s replacing.
I also remember when it was just called "System"
(1) Yeah yeah I know all about NeXT, but OS X isn't NeXT as anyone who used Rhapsody will remember