App for sharing workouts with friends


I am not that much into social networks, therefore I try it here. :slight_smile:

A friend of mine struggles often to do its workouts (for loosing weight) reguarly.
Therefore I am looking for an app, where we can share our workouts. I have a garmin watch and he has a apple watch to record the workouts. I know that garmin people can challenge garmin friends and apple watch user can challenge apple health users etc… but I look for a crossplattform app to share the workouts.

Maybe someone here has an idea.

I dont want to share much data. Number of workouts, intensity minutes / week or month and maybe the kind of workout, we have recorded. It should be more like a little challenge: “Oh he is 3 workouts a head, I have to keep up!” :slight_smile: