This product from Techsmith can help out many coaches and trainers with their students and classes. http://www.techsmith.com/coachs-eye.html The Android version is free. The Windows and IOS versions cost a very nominal amount. Techsmith has even given the product it's own, separate website http://www.coachseye.com/features They even have tutorials on the website. A product definitely worth checking out for coaches, trainers, teams and even pros at all levels.
I had a look before based on Visor's recommendation. It looks good but quite a lot of stuff I didn't really need
