I am trying to track my one to one clients dur our training sessions and possibly during their own workouts so i can show what zone they are working in and how their zones change over time. These belts usually connect to an app on the coaches or class instructors’ iPad, data is stored, graphs automatically created and sent to the clients polar or myzone account. Problem is these are designed for clubs and come with enormous setup fees. Does anyone know about alternative ways to do these things, I don’t want to get all my clients buy the same fitness watch because many of them have their own fitbit or jawbone and similar gadgets already.