What apps use data on an iPhone?

I have an iPhone and want to know if alarm clock pro, temple run, or Nike run use data.

Alarm doesn't use data, don't know what the others are. But not all games use data. I have a blackberry. I play games on the train with no internet connection. Try them on the train where there's no internet and see if they still work. Then you will know for sure.

I do not believe that any of these apps use any data. To check, you could turn on airplane mode and open each application.

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