Charmin turns your raw device data into performance intelligence — and makes training social. Sync, analyze, and compete with your crew.
Free to join. Bring your own Garmin.
Not just a data dump — every metric is connected to help you understand the full picture of your training.
Pull in every run, ride, and workout from your Garmin device and Apple Watch automatically. One source of truth for all your training data.
Track your efficiency score — speed per heart rate beat — to measure true fitness gains over time, not just pace. See trends across every training block.
Correlate your sleep stages, HRV, and SpO₂ with next-day run quality. Understand how recovery drives performance before you lace up.
Compete on a rolling 28-day leaderboard with friends. Rankings are based on efficiency score so effort always beats raw speed.
Charmin ranks athletes by efficiency — speed divided by heart rate. Not by who runs fastest, but by who runs smartest. A 5:30/km pace at 140bpm beats a 5:00/km pace at 175bpm every time.
Connect your devices and join the leaderboard.