I have some (admittedly older) apps on my iPad that worked fine until recently. Now they won't even open and I get an error saying that app doesn't work on iOS 11 and needs to be updated. It so happens there are no more updates to these apps. BUT, I have used them in iOS 11 before! In fact, for at least one app, I have evidence that I used it under iOS11, probably 11.0 or 11.1. Perhaps even the earlier version of 11.2. So, somehow with the 11.2.5 or 2.6 upgrade, Apple decided not to let these apps work anymore. Why not?? They worked fine under 11. Saying the app doesn't work with 11 is bunk. I suspect that this is actually a bug. Is this a known issue? I poked around here a bit, and didn't see anything.