Garmin + Meryus

Garmin Connect is a great data store and a mediocre social app. The Connect challenges feature is buried, clunky, and only works with other Garmin users. Meryus sits next to it: connect once and every activity, step count, sleep score, HRV, and stress reading feeds into challenges with a friendlier UI, and your non-Garmin friends can join too.

Why Meryus, not Connect groups

  • Better UI. A clean real-time chart instead of a buried tab.
  • Any metric. Steps, sleep, HRV, stress, weight, or anything custom.
  • No ecosystem lock-in. Friends on Strava or with no wearable can still join.
  • Custom challenge formats. Daily targets, fixed totals, or open-ended habits.
  • Private by default. Join code only, no public feed.

How the sync works

  1. Sign in to Meryus and tap "Connect Garmin" in your profile.
  2. Approve the Garmin OAuth permissions (PKCE flow, no password leaves Garmin).
  3. Meryus registers webhooks for activities, dailies, sleep, HRV, and stress.
  4. New data shows up in your active challenges within minutes of syncing your watch.

What syncs

  • Activities: runs, rides, walks, swims, hikes
  • Daily steps
  • Sleep duration (decimal hours)
  • HRV (heart rate variability)
  • Resting heart rate
  • Stress score
  • Body battery

Challenges Garmin natively can't run

  • "10,000 steps every day for a month" with a mixed Garmin/Strava/no-wearable group
  • "Average 7+ hours of sleep this month"
  • "Keep HRV above your baseline"
  • "Lower resting heart rate by 5 bpm in 90 days"
  • "Custom: stretching minutes per week"
Connect Garmin (free)