Nike Plus App Crashing on Start

My iPhone 5 is perfect apart from when I click the Nike + App it immediately crashes. I've reset the phone and even done a full reset (where it asks what language etc) from scratch and nothing, it still crashes on this App. Customer support were useless. I'm on the iOS update 6.0.2.

To clarify I'm talking about the inbuilt Nike + App not the Nike + Running App- this is because I got a Nike + Sensor for Xmas and I would like to use it. The App & sensor work perfectly on my wife's iPhone 4S.

Help!