Best wearable for VO2 Max
The best wearable for VO2 max?
VO2 max is the single strongest wearable-measurable predictor of cardiorespiratory fitness and long-term mortality. Devices estimate it from the relationship between pace or power and heart rate during outdoor efforts, so GPS sports watches with strong HR modeling win, and rings, which only infer it from resting HR trends, cannot compete.
The ranking
20 devices scored1
GarminSports watchFirstbeat VO2 max is the industry benchmark, with separate running and cycling estimates plus race predictors.942
Apple WatchSmartwatchCardio Fitness estimates VO2 max from GPS pace and heart rate. A 2025 validation found it usable but imperfect (mean absolute error ~6.9 mL/kg/min vs a treadmill test), so read it as a trend rather than a lab number.PLOS ONE 2025 ↗843
PolarSports watchPolar’s Firstbeat-derived VO2 max and Running Index are long-trusted by coaches.824
Galaxy WatchSmartwatchThe best all-around smartwatch for Android.805
Polar H10Chest heart-rate strapA chest strap feeds lab-grade heart rate to any app, producing the cleanest possible VO2 max estimate.786
COROSSports watchEvoLab covers the useful training measures, though its absolute VO2 max reads a touch low versus Garmin.767
Garmin HRMChest heart-rate strapChest-strap heart rate removes optical noise at high intensity, so a paired watch produces noticeably cleaner VO2 max estimates.768
Google Pixel WatchSmartwatchFitbit’s health engine in a clean Android watch.749
SuuntoOutdoor watchSolid VO2 max via TrainingPeaks-licensed metrics on the current AMOLED watches.7210
WHOOPRecovery bandEstimates VO2 max from workouts, but with no GPS it leans on the phone.7211
FitbitFitness trackerFriendly, affordable everyday activity and sleep.6812
Withings ScanWatchHybrid smartwatchA medical-grade hybrid with a 30-day battery.6613
AmazfitSports watchLong battery and big specs at a value price.6414
Fitbit AirScreenless trackerGoogle’s affordable screenless health band.5515
Oura RingSmart ringA ring cannot see pace or power, so its cardio estimate is a directional trend, not a training number.4216
Ultrahuman Ring AIRSmart ringThe best no-subscription ring, and the only one that pairs with a CGM.4017
Samsung Galaxy RingSmart ringThe lightest ring, best inside Samsung’s ecosystem.3818
Amazfit Helio RingSmart ringThe best-value titanium ring, no subscription.3519
RingConnSmart ringClass-leading battery, genuinely subscription-free.3020
Circular Ring 2Smart ringThe most ambitious ring on paper, held back by software.30
GarminSports watchFirstbeat VO2 max is the industry benchmark, with separate running and cycling estimates plus race predictors.942Apple WatchSmartwatchCardio Fitness estimates VO2 max from GPS pace and heart rate. A 2025 validation found it usable but imperfect (mean absolute error ~6.9 mL/kg/min vs a treadmill test), so read it as a trend rather than a lab number.PLOS ONE 2025 ↗843PolarSports watchPolar’s Firstbeat-derived VO2 max and Running Index are long-trusted by coaches.824Galaxy WatchSmartwatchThe best all-around smartwatch for Android.805Polar H10Chest heart-rate strapA chest strap feeds lab-grade heart rate to any app, producing the cleanest possible VO2 max estimate.786COROSSports watchEvoLab covers the useful training measures, though its absolute VO2 max reads a touch low versus Garmin.767Garmin HRMChest heart-rate strapChest-strap heart rate removes optical noise at high intensity, so a paired watch produces noticeably cleaner VO2 max estimates.768Google Pixel WatchSmartwatchFitbit’s health engine in a clean Android watch.749SuuntoOutdoor watchSolid VO2 max via TrainingPeaks-licensed metrics on the current AMOLED watches.7210WHOOPRecovery bandEstimates VO2 max from workouts, but with no GPS it leans on the phone.7211FitbitFitness trackerFriendly, affordable everyday activity and sleep.6812Withings ScanWatchHybrid smartwatchA medical-grade hybrid with a 30-day battery.6613AmazfitSports watchLong battery and big specs at a value price.6414Fitbit AirScreenless trackerGoogle’s affordable screenless health band.5515Oura RingSmart ringA ring cannot see pace or power, so its cardio estimate is a directional trend, not a training number.4216Ultrahuman Ring AIRSmart ringThe best no-subscription ring, and the only one that pairs with a CGM.4017Samsung Galaxy RingSmart ringThe lightest ring, best inside Samsung’s ecosystem.3818Amazfit Helio RingSmart ringThe best-value titanium ring, no subscription.3519RingConnSmart ringClass-leading battery, genuinely subscription-free.3020Circular Ring 2Smart ringThe most ambitious ring on paper, held back by software.30Explore it yourself
Switch signals, find your personal match, or drag devices into a stack to see the combined coverage.
Rank every wearable by one signal.
What is the best wearable for VO2 max? VO2 max is the single strongest wearable-measurable predictor of cardiorespiratory fitness and long-term mortality. Devices estimate it from the relationship between pace or power and heart rate during outdoor efforts, so GPS sports watches with strong HR modeling win, and rings, which only infer it from resting HR trends, cannot compete.
1GarminSports watchFirstbeat VO2 max is the industry benchmark, with separate running and cycling estimates plus race predictors.942Apple WatchSmartwatchCardio Fitness estimates VO2 max from GPS pace and heart rate. A 2025 validation found it usable but imperfect (mean absolute error ~6.9 mL/kg/min vs a treadmill test), so read it as a trend rather than a lab number.PLOS ONE 2025 ↗843PolarSports watchPolar’s Firstbeat-derived VO2 max and Running Index are long-trusted by coaches.824Galaxy WatchSmartwatchThe best all-around smartwatch for Android.805Polar H10Chest heart-rate strapA chest strap feeds lab-grade heart rate to any app, producing the cleanest possible VO2 max estimate.786COROSSports watchEvoLab covers the useful training measures, though its absolute VO2 max reads a touch low versus Garmin.767Garmin HRMChest heart-rate strapChest-strap heart rate removes optical noise at high intensity, so a paired watch produces noticeably cleaner VO2 max estimates.768Google Pixel WatchSmartwatchFitbit’s health engine in a clean Android watch.749SuuntoOutdoor watchSolid VO2 max via TrainingPeaks-licensed metrics on the current AMOLED watches.7210WHOOPRecovery bandEstimates VO2 max from workouts, but with no GPS it leans on the phone.7211FitbitFitness trackerFriendly, affordable everyday activity and sleep.6812Withings ScanWatchHybrid smartwatchA medical-grade hybrid with a 30-day battery.6613AmazfitSports watchLong battery and big specs at a value price.6414Fitbit AirScreenless trackerGoogle’s affordable screenless health band.5515Oura RingSmart ringA ring cannot see pace or power, so its cardio estimate is a directional trend, not a training number.4216Ultrahuman Ring AIRSmart ringThe best no-subscription ring, and the only one that pairs with a CGM.4017Samsung Galaxy RingSmart ringThe lightest ring, best inside Samsung’s ecosystem.3818Amazfit Helio RingSmart ringThe best-value titanium ring, no subscription.3519RingConnSmart ringClass-leading battery, genuinely subscription-free.3020Circular Ring 2Smart ringThe most ambitious ring on paper, held back by software.30
GarminSports watchFirstbeat VO2 max is the industry benchmark, with separate running and cycling estimates plus race predictors.942Apple WatchSmartwatchCardio Fitness estimates VO2 max from GPS pace and heart rate. A 2025 validation found it usable but imperfect (mean absolute error ~6.9 mL/kg/min vs a treadmill test), so read it as a trend rather than a lab number.PLOS ONE 2025 ↗843PolarSports watchPolar’s Firstbeat-derived VO2 max and Running Index are long-trusted by coaches.824Galaxy WatchSmartwatchThe best all-around smartwatch for Android.805Polar H10Chest heart-rate strapA chest strap feeds lab-grade heart rate to any app, producing the cleanest possible VO2 max estimate.786COROSSports watchEvoLab covers the useful training measures, though its absolute VO2 max reads a touch low versus Garmin.767Garmin HRMChest heart-rate strapChest-strap heart rate removes optical noise at high intensity, so a paired watch produces noticeably cleaner VO2 max estimates.768Google Pixel WatchSmartwatchFitbit’s health engine in a clean Android watch.749SuuntoOutdoor watchSolid VO2 max via TrainingPeaks-licensed metrics on the current AMOLED watches.7210WHOOPRecovery bandEstimates VO2 max from workouts, but with no GPS it leans on the phone.7211FitbitFitness trackerFriendly, affordable everyday activity and sleep.6812Withings ScanWatchHybrid smartwatchA medical-grade hybrid with a 30-day battery.6613AmazfitSports watchLong battery and big specs at a value price.6414Fitbit AirScreenless trackerGoogle’s affordable screenless health band.5515Oura RingSmart ringA ring cannot see pace or power, so its cardio estimate is a directional trend, not a training number.4216Ultrahuman Ring AIRSmart ringThe best no-subscription ring, and the only one that pairs with a CGM.4017Samsung Galaxy RingSmart ringThe lightest ring, best inside Samsung’s ecosystem.3818Amazfit Helio RingSmart ringThe best-value titanium ring, no subscription.3519RingConnSmart ringClass-leading battery, genuinely subscription-free.3020Circular Ring 2Smart ringThe most ambitious ring on paper, held back by software.30FAQ
What is the best wearable for VO2 max?
For most people, the Garmin is the best wearable for VO2 max. Firstbeat VO2 max is the industry benchmark, with separate running and cycling estimates plus race predictors. The Apple Watch is a strong runner-up. That said, the "best" device depends on the rest of your goals. Vora can coach on VO2 max data from any of them.
Is the Garmin or Apple Watch better for VO2 max?
For VO2 max specifically, the Garmin edges ahead (94 vs 84 in our scoring). Firstbeat VO2 max is the industry benchmark, with separate running and cycling estimates plus race predictors. However, Apple Watch may win overall if your other priorities differ.
Can Vora use VO2 max data from any wearable?
Yes. Vora reads VO2 max and related signals from Oura, WHOOP, Garmin, Apple Health, Fitbit, Samsung Health and more, then reconciles overlapping sources and turns the result into a daily plan. You keep your device; Vora is the coaching layer on top.
How is this VO2 Max ranking scored?
Each device is scored 0-100 on VO2 max based on sensor quality, form factor and how the signal is captured (for example, overnight versus spot samples, or GPS versus inferred estimates). VO2 max is the single strongest wearable-measurable predictor of cardiorespiratory fitness and long-term mortality. Devices estimate it from the relationship between pace or power and heart rate during outdoor efforts, so GPS sports watches with strong HR modeling win, and rings, which only infer it from resting HR trends, cannot compete.
Keep exploring
Oura RingUltrahuman Ring AIRSamsung Galaxy RingRingConnCircular Ring 2Amazfit Helio RingApple WatchGalaxy WatchGoogle Pixel WatchWithings ScanWatchGarminCOROSSuuntoPolarAmazfitWHOOPFitbitFitbit AirPolar H10Garmin HRM
Dexcom (Stelo / G7)
Abbott Lingo / Libre
Levels
Eight Sleep
Withings Sleep
Withings Body Scan
InBody
Hume Body Pod
Garmin Index S2Keep your wearable. Add a coach that acts on the data.
Vora works with Oura, WHOOP, Garmin, Apple Health, Fitbit, Samsung Health, Eight Sleep, CGMs and hundreds more, turning whatever you wear into workouts, nutrition, recovery and a daily plan.
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