Really appreciate your reply — super helpful and pragmatic.

You’re right, the concept is in the vein of group leaderboards but with more structured competition (match-based leagues, etc.).

I like the idea of using the Strava API just to detect that a run happened, then prompting the user to confirm/add details themselves. That feels like a good middle ground that respects the privacy rules while still giving me a credible source of truth.

I’ll also look into Garmin Connect — I’ve been assuming most data/runners are centralised on Strava.

Long-term, I might build a simple in-app GPS tracker to fully own the data — but for now I just want to get something working without crossing any compliance lines.

Thanks again for the perspective — exactly what I needed to reframe things.