Data not syncing

My Polar isn’t syncing

Reviewed October 2026 1 minute read

  1. Sync your watch with the Polar Flow app and check your activity shows there.
  2. In Flow: More → General settings → Partners. YuMuuv should show Disconnect, which means it’s connected.
  3. Wait for the next hourly sync, then open YuMuuv.
  4. Still missing? In YuMuuv: profile circle (top right) → Your details → Change integration → Polar. If that doesn’t help, choose No integration first, then Polar.

Workouts only come through if you start a training session on the watch. If Polar says it’s already connected to another YuMuuv account, see Garmin or Polar says it’s already connected.

Applies to