Right, a large number of apps (and older devices too I think) will be incompatible with iOS 11 unless the developers update them, so that's what the warning is about. It seems like a beta iOS 11 might be available soon, but the official version won't arrive until late in the year as far as I understand.

Edited by Andrew - PG Music (06/01/17 09:52 PM)
PG Music Inc.