Do all Iphone apps need cellular data to run?

During one of my games, my Wi-Fi went down and it said I needed cellular data. Do I need this for every app or does it just say this for every app? I don't want any charges for not using the cellular data…

No. If the app requires internet access to run then if you don't have Wi-Fi you'd need data to run it with. You wouldn't get charged for not using cellular data of course.

Um. What? Not all apps use data, but the ones that do, if there's no Wi-Fi available, then it will try to use your alloted data. And if you have that option turned off, then its not gonna work. You won't be charged for not using data, that doesn't make sense

You can turn it off. I turn it off on my phone. Only games that require internet will say that message

A large amount apps require data if they're apps that update frequently like twitter/instagram/facebook… Apps that don't require data would be like a note pad, or a calculator… Even some games