that's beyond silly.
well i just got the phone, all the nokia apps are outdated (and not even called by their brand HERE) so I updated one of them (maps, because i wanted the offline maps) but figured i may as well do the rest. I knew there was apps to update just had NO clue where to do it.
No manual checks is just dumb...
You can manually check by looking for the app in the store. If there's an update that your live tile hasn't notified you of, you'll see it there. If there's no update, you'll just see the Share button.