Strava Flyby

Not quite sure how long this has been around but I just noticed this on my brother-in-law’s activity today. See the gray button circled in the activity page that has been highlighted:

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Meet someone on a ride and forget their name? Did someone pass you and you wonder to yourself, “How far did/will s/he ride?”. Now you can find out with Strava Flybys.  Learn more from their project page here.