There are a lot of differences between ClubHub and Game Golf and Arccos--mainly that we don't just do shot tracking. ClubHub is able to also show you swing analysis metrics such as club head speed, angle of attack, face angle, transition angle, and tempo as well as a 3D view of your swing. Neither Game Golf or Arccos can do this. Along with those swing metrics we also give you shot tracking capabilities on thousands of courses around the world. Once you pair ClubHub sensors to your clubs via our app you are all set to play on the range or on the course, no need to push any power buttons or tap your belt before each hit ClubHub takes care of it all so you can focus on what's important--golf!