Watch comparison
VO2max on every watch, compared.
How 12 brands estimate your VO2max, what they need from you, what else they show — and what independent studies say about accuracy.
Where each watch gets its VO2max
| Brand | Called | Run | Walk | Treadmill | Bike + power | Resting test | All-day | Fitness age | Race predictor | Studies |
|---|---|---|---|---|---|---|---|---|---|---|
| Amazfit Zepp Health PeakBeats workout status… | VO₂ Max | ✓Yes | –No | –No | –No | –No | –No | ?Not confirmed | ✓Yes | 0 |
| Apple Apple in-house | Cardio Fitness | ✓Yes | ✓Yes | –No | ?Not confirmed | ?Not confirmed | ✓Yes | ?Not confirmed | ?Not confirmed | 3 |
| COROS In-house EvoLab | VO2 Max | ✓Yes | ?Not confirmed | –No | ✓Yes | ?Not confirmed | ?Not confirmed | ?Not confirmed | ✓Yes | 0 |
| Garmin Garmin in-house, built on Firstbeat… | VO2 Max. | ✓Yes | ✓Yes | –No | ✓Yes | ?Not confirmed | ?Not confirmed | ✓Yes | ✓Yes | 5 |
| Google Pixel & Fitbit | VO2 max (called Cardio Fitness Score before 2026) | ✓Yes | –No | –No | –No | –No | –No | ?Not confirmed | ?Not confirmed | 3 |
| Huawei Not named by Huawei | VO2Max | ✓Yes | ✓Yes | –No | ?Not confirmed | ?Not confirmed | ?Not confirmed | ?Not confirmed | ✓Yes | 1 |
| Oura Oura in-house | Cardio Capacity (VO2 Max) | ?Not confirmed | ✓Yes | –No | ?Not confirmed | ?Not confirmed | ?Not confirmed | ?Not confirmed | ?Not confirmed | 0 |
| Polar Polar in-house | VO2max (Fitness Test, Walking Test) and Running Index | ✓Yes | ✓Yes | ?Not confirmed | ✓Yes | ✓Yes | ?Not confirmed | ?Not confirmed | ✓Yes | 4 |
| Samsung | VO2 max | ✓Yes | ?Not confirmed | ?Not confirmed | ?Not confirmed | ?Not confirmed | ?Not confirmed | ?Not confirmed | ?Not confirmed | 0 |
| Suunto Not named in current Suunto manuals | Fitness level (VO2max) | ✓Yes | ✓Yes | ?Not confirmed | ?Not confirmed | ?Not confirmed | ?Not confirmed | ✓Yes | ✓Yes | 0 |
| Wahoo | — | No VO2max estimate | ?Not confirmed | ?Not confirmed | 0 | |||||
| WHOOP WHOOP in-house machine-learning model | VO2 Max | ✓Yes | ?Not confirmed | ?Not confirmed | ?Not confirmed | ?Not confirmed | ✓Yes | ?Not confirmed | ?Not confirmed | 0 |
✓ supported · – not supported · ? not confirmed in official documentation. Studies = published validation studies we found.
Which watch for VO2max?
You run outdoorsAlmost every brand estimates VO2max from GPS runs with heart rate.Amazfit · Apple · COROS · Garmin · Google Pixel & Fitbit · Huawei · Polar · Samsung · Suunto · WHOOP
You mostly cycleLook for estimates from rides with a power meter.COROS · Garmin · Polar
You don't runSome brands estimate from walks, a resting test or all-day data.Apple · Garmin · Huawei · Oura · Polar · Suunto · WHOOP
You want race timesRace predictors turn your fitness into 5K–marathon estimates.Amazfit · COROS · Garmin · Huawei · Polar · Suunto
Head to head
All comparisons →Brand by brand
Researched from each brand's official manuals and support pages, plus published studies; features change with firmware, so check your model. Brand names are trademarks of their owners; VO2max Health is independent and not affiliated with any of them. Read how accurate watch VO2max estimates are.