It's an app developed for the iPad that works with a small heart monitor to provide soldiers with education and training supplemented by realtime biofeedback data. It purports to give soldiers the tools necessary to respond adaptively to real-world stress, reducing incidences of PTSD, reducing healthcare costs, smoothing transitions to civilian life, and improving lives.
Here is a link to the instructional video that introduces soldiers to their new tools in the fight against PTSD.