I suppose what it's offering the rider would possibly know? I know how long my schooling sessions are. I know how long I spend lunging on each rein- because I have a two trotting songs for each rein. ( which reminds me they possibly need changing to fit her gait better)
As for gadgets I want a face time system so my instructor doesn't have to be physically present. Sure there would be a way of doing that these days- at cost.