Best 2025 Smartwatches for blood oxygen tracking

#1 OnePlus Watch 3
4.9

Blood oxygen readings were limited in coverage but strongly positive where tested against reference readings.

Pros: blood oxygen tracking, step counting accuracy

Cons: LTE connectivity, calorie tracking usefulness

#2 Amazfit Active 2
4.5

Blood oxygen readings were viewed positively where tested, with one reviewer reporting very small deviations and another calling results accurate enough.

Pros: pairing reliability, value for money

Cons: stress tracking, onboard music storage

#3 Amazfit T-Rex 3 Pro
4.5

Blood oxygen tracking received limited but positive evidence, with one reviewer saying it matched a comparison watch’s 96 percent reading impressively.

Pros: workout tracking variety, calorie tracking usefulness

Cons: LTE connectivity, ECG functionality

#4 Suunto Vertical 2
4.5

Blood oxygen evidence was limited but positive, tied to a redesigned sensor that improved stability during demanding outdoor use.

Pros: operating system experience, materials quality

Cons: contactless payments, onboard music storage

#5 Apple Watch Series 11
4.4

Blood oxygen tracking is treated as a welcome restored capability that makes the watch feel more complete as a health device.

Pros: ECG functionality, app ecosystem

Cons: cross-platform compatibility, recovery insights

#6 CMF Watch 3 Pro
4.3

Blood oxygen readings were limited in the review evidence but positive where compared directly, with one user finding pulse-ox results very close to a finger oximeter.

Pros: workout tracking variety, user interface

Cons: Wi-Fi connectivity, onboard music storage

#7 Samsung Galaxy Watch 8
4.1

Blood oxygen tracking drew limited but mostly positive evidence, with one reviewer matching an oximeter while another found it weaker during sleep.

Pros: third-party app support, heart rate accuracy

Cons: music controls, cross-platform compatibility

#8 Amazfit Balance 2
4.0

Blood oxygen tracking received limited but positive evidence as part of the BioTracker suite, which one reviewer said handled health vitals admirably.

Pros: Bluetooth connectivity, calorie tracking usefulness

Cons: ECG functionality, flashlight usefulness

#9 Amazfit Bip 6
4.0

Blood oxygen readings received limited direct evaluation, but TechAdvisor found the data aligned well with other devices.

Pros: value for money, battery life

Cons: contactless payments, stress tracking

#10 Garmin Forerunner 970
4.0

PulseOx-related evidence centered on improved practicality, with one reviewer finding breathing-variation tracking no longer caused a notable overnight battery penalty.

Pros: stress tracking, customization options

Cons: menu navigation, companion app quality

#11 Garmin Vivoactive 6
4.0

Blood oxygen tracking appears as part of the watch's broader accurate health-monitoring package, but reviewers did not deeply test it as a standalone feature.

Pros: software smoothness, comfort

Cons: LTE connectivity, voice assistant quality

#12 Motorola Moto Watch Fit
4.0

Blood oxygen tracking was treated as part of a basic health suite that appeared to work well in daily use.

Pros: software smoothness, menu navigation

Cons: contactless payments, stress tracking

#13 Suunto Run
3.5

Blood oxygen tracking was mentioned as an advanced capability, but reviewers provided little quality-focused testing beyond noting the sensor support.

Pros: comfort, value for money

Cons: contactless payments, Wi-Fi connectivity

#14 Garmin Approach S50
3.2

Blood oxygen tracking was viewed as adequate but not cutting edge because reviewers noted the older Gen 4 sensor platform rather than Garmin’s newest hardware.

Pros: touchscreen responsiveness, health tracking accuracy

Cons: call handling, voice assistant quality

#15 Apple Watch SE 3
2.1

Blood oxygen tracking was consistently treated as a missing premium health feature, with reviewers noting it remains reserved for higher-end Apple Watches.

Pros: app ecosystem, operating system experience

Cons: cross-platform compatibility, ECG functionality

#16 Samsung Galaxy Watch Ultra (2025)
2.0

Blood oxygen tracking drew a clear caveat, with one reviewer repeatedly seeing lower SPO2 results than expected from other sensors.

Pros: LTE connectivity, pairing reliability

Cons: antioxidant index, blood oxygen tracking