I can only speak from the experience of one app at one company, but data we collected was for troubleshooting. Mainly because customers will email us stuff like “your app doesn’t work!!! Worst company ever!!” And absolutely no identifying information whatsoever. To make matters worse they’ll email with an email that they didn’t give us as a customer so how in the world are we supposed to help‽
So we collect enough data so whoever in the company might need to help them can actually do so.
There’s a lot of “this app is impossible to use!!!” That we find out with enough data collection is just them refusing to hit the GIANT button in the middle of the damn screen that would solve their problem. I hate users.
I believe we answered questions in the Apple and Google stores that says that we collect information and send it to 3rd parties (because analytics platforms are technically 3rd party) but not to sell it. I don’t know if that distinction is clear on the stores though.
A shocking number of users would be hard pressed to figure out how to type in a url to a mobile web browser… or even know what that is, and they deserve a nice user interface too. App stores make it easier to find, too.