We currently have an iOS 7 App in the AppStore that works on iOS 7 and iOS 8 devices. Now we implemented some iOS 8 only features and will publish this App as an update for the current iOS 7 App. I know that iOS 7 devices will not update to the new version but:
Will iOS 7 users still find and be able to install the older iOS 7 App?
Yes, but this comes with a tradeoff:
There are only 3 possibilities to install the old iOS 7 app on an iOS 7 device:
Unfortunately the most common usecase to just download the app in the iOS AppStore for the first time will not work.