Compatibility guide
Which sports watches work with Intervals.icu
Garmin, Amazfit, Polar, COROS, Suunto, Apple Watch — which connect natively, which need Strava, and what data actually syncs. A practical compatibility reference.
Connect your watchWatch compatibility at a glance
Native integration means direct sync without a middleman. Strava means your watch must route data through Strava first. Bridge means a third-party app is required.
- ✓Full bidirectional sync — workouts and wellness
- ✓HRV Status and body battery
- ✓Workout push to all Garmin models
- ✓Training load and VO2max
- ✓Native sync via Zepp — workouts, wellness, HRV
- ✓Workout push to T-Rex 3 Pro and Balance 2
- ✓Sleep score and SPO2
- ✓Good data coverage at a lower price
- ✓Native direct sync — workouts and HR
- ✓Training load and recovery status
- ✓No workout push to watch
- →Workouts sync via Strava
- →No wellness or HRV via this route
- →No workout push
- →Workouts sync via Strava
- →No wellness or HRV via this route
- →No workout push
- →Requires HealthFit, RunGap, or Strava
- →No native wellness or HRV sync
- →No workout push
- →Workouts sync via Strava
- →No wellness data
Garmin — full integration, best support
Garmin connects directly to Intervals.icu without any middleware. The sync is bidirectional: workouts flow from the watch to Intervals.icu automatically, and structured workouts planned in Intervals.icu push to the watch.
HRV Status, Body Battery, training load, and VO2max estimations are all available in Intervals.icu. This is the most complete data pipeline of any watch brand on the platform.
Every recorded activity appears in Intervals.icu within minutes of syncing the watch to the Garmin app.
Structured interval workouts built in Intervals.icu sync directly to the watch for all Garmin models.
HRV Status, Body Battery, stress score, and sleep data all sync natively — key inputs for recovery analysis.
Garmin's training load and VO2max estimate complement Intervals.icu's own CTL/ATL/TSB metrics.
Amazfit / Zepp — native, strong value
Amazfit has native integration with Intervals.icu through the Zepp platform. After authorization, workouts sync automatically within a few minutes of completing an activity. Wellness data — sleep, SPO2, stress — and HRV (rMSSD) are available when enabled in the Intervals.icu settings.
Amazfit covers most of what Garmin offers at a significantly lower price point. The main limitation is workout push: only T-Rex 3 Pro and Balance 2 support receiving planned workouts from Intervals.icu.
Connect Amazfit once in Intervals.icu settings — all subsequent workouts sync automatically without any manual action.
HRV (rMSSD), sleep score, SPO2, and stress data available — must be enabled manually in the Amazfit connection settings.
All major endurance sports recorded on Amazfit sync correctly with sport-specific fields preserved.
Amazfit watches cost significantly less than comparable Garmin models while delivering similar data coverage in Intervals.icu.
Workout push: Available on T-Rex 3 Pro and Balance 2. Intervals.icu automatically uploads planned workouts for the next 7 days. Open the Zepp app on your phone to sync them to the watch.
Other brands — via bridge
Polar connects natively but with fewer features than Garmin or Amazfit. COROS, Suunto, and Apple Watch require routing data through Strava or a third-party app.
Polar
Polar connects directly to Intervals.icu. Workouts and heart rate data sync automatically. Training load metrics are available. Wellness data is limited compared to Garmin or Amazfit, and there is no workout push to the watch.
COROS
COROS has no direct Intervals.icu integration. The recommended route is COROS → Strava → Intervals.icu. Workouts transfer correctly, but wellness data and HRV are lost in transit. No workout push to the watch.
Suunto
Suunto syncs to Intervals.icu via Strava. Workouts transfer with basic GPS and HR data. Wellness metrics and HRV do not transfer this way. No workout push support.
Apple Watch
Apple Watch has no direct connection to Intervals.icu. Use HealthFit or RunGap to export workouts as FIT files, or connect through Strava. Native wellness sync is not available. No workout push.
Wahoo
Wahoo cycling computers sync via Strava. Workout data transfers correctly for cycling. No wellness data and no workout push support.
What to choose if you don't have a watch yet
If Intervals.icu is central to your training analysis, the watch brand matters. Here is a practical guide by budget and use case.
Native full sync, workout push, HRV Status, Body Battery. Most complete Intervals.icu integration at a mid-range price.
Native sync, HRV, wellness, and workout push at significantly lower cost than comparable Garmin. Strong choice for runners and cyclists.
Native Intervals.icu sync, wellness, and HRV. No workout push, but everything else works out of the box.
FAQ
Does Amazfit work with Intervals.icu?
Yes. Amazfit has native integration with Intervals.icu via Zepp. Workouts, wellness, and HRV sync automatically. T-Rex 3 Pro and Balance 2 also support receiving planned workouts from Intervals.icu.
Which watch has the best Intervals.icu integration?
Garmin offers the most complete integration: full bidirectional sync, workout push to all models, HRV Status, Body Battery, training load. Amazfit is a strong second with native integration at a lower price.
Does COROS work with Intervals.icu?
COROS has no direct integration. Sync goes through Strava: COROS → Strava → Intervals.icu. Workouts transfer, but wellness and HRV data are lost. No workout push support.
Does Apple Watch work with Intervals.icu?
No direct connection. Use HealthFit, RunGap, or Strava to route Apple Watch data to Intervals.icu. Native wellness and HRV sync is not available.
Is Intervals.icu free?
Yes. Intervals.icu is completely free for personal use. No paid tiers, no subscriptions.
Related guides
Connect your watch to STAS
STAS reads your Intervals.icu data — workouts, CTL/ATL/TSB, pace zones — and brings it into ChatGPT as a personal AI coach.
Connect watchFree, no credit card