 This research is being done to evaluate whether or not a customized version of the VibrentTM formerly FitNinjaTM mobile app is a feasible way to help people manage and control the pain from radiation sores also referred to as mucositis when treating head and neck cancers with radiation. The mobile app will be designed to help people better understand the pain from the radiation sores and how to better use their medications especially when they are away from the hospital. 