I like how easy it was for me as well my clients (who are also personal trainers) using this app! It helped us track our workouts together so we could do them at home or in class without any issues of confusion about what each other did/did not see during their session(s).
Nothing really - but if you're looking into something similar then definitely give ZINGFIT A TRY!! We were able to easily connect via video call when working out remotely which made things easier than ever before since both parties didn't have access to one another physically anymore while still being connected virtually through zoom / google hangouts etc..