Are jail-broken iPhones compatible with MotionX-GPS?

Yes, our goal is to support all iPhone™ users. However, some jail-broken iPhone™ configurations and applications interfere with other iPhone™ applications such as MotionX-GPS. Some users have experienced trouble getting past the terms and conditions page of MotionX-GPS with jail-broken iPhones. Several users have indicated that removing a particular SMS application specific to jail-broken phones resolved the issue. Other users simply needed to update their iPhones with the latest jailbreak updates.