Apps on iPhone 5 and ipad 4 won't install?

I bought nfs most wanted on my iPhone 5 it downloaded perfectly but when it was installing an are pops up: "the application can't be downloaded, Nfs most wanted could not be downloaded at this time" and this happened also on my iPad 4 and iPod 5 why is this happening? Is it the iOS 6 program?

Added (1). The problem is happening with every app I buy… Free apps have no problem

It's the game. Has a glitch. Try deleting and re-downloading. And/or contact the company who made the app to let them know your problem.

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