iOS App Store having issues updating apps (Gmail the cause?)
Apparently, many people on Twitter are complaining that they can't update apps on iOS, and some are even saying that they can't download apps at all. We've tested it and haven't had issues. And, we know from your comments that some of you have had success updating Gmail, so the issue may be somewhat sporadic.
We're sure that there are already silly conspiracy theories being built that Apple is causing the problem to keep people away from the Google app, but that's pretty unlikely.
We'll keep digging and let you know if we find out any more info.
source: Venture Beat