Same here, iOS was never my main thing, but I did write a couple of apps for it. I can't remember the specifics, but it seems way too common for them to change an API that ought to be already settled, for lack of a better term.

This just means that every time they change something, the devs have to rebuild, with an unknown amount of time spent. It might be as easy as just changing a couple of lines, or they changed the API so much you have to rethink your code.

And this is for apps that aren't using anything new, it's the old APIs that are changing under them.