Best 2026 Smartwatches for fitness tracking accuracy

#1 Garmin Forerunner 170
5.0

Overall workout tracking impressed testers, with strong agreement between the watch and trusted comparison devices in controlled runs.

Pros: recovery insights, fitness tracking accuracy

Cons: ECG functionality, call handling

#2 Garmin Forerunner 170 Music
4.8

Distance, pace, swimming, and indoor workout tracking were consistently reliable across testing. The watch performs close to more expensive sports watches for most common activities.

Pros: music controls, pairing reliability

Cons: LTE connectivity, ECG functionality

#3 Amazfit Balance 3
4.7

General sports tracking earned strong praise, including running and unusually good strength-session heart-rate performance. Testers found the data dependable enough to compete with substantially more expensive watches.

Pros: battery life, watch face quality

Cons: activity auto-detection, LTE connectivity

#4 Garmin Forerunner 70
4.6

Core tracking for pace, distance, steps, and heart rate is dependable across running, walking, swimming, and indoor workouts. Elevation data is less precise because there is no barometric altimeter.

Pros: step counting accuracy, app ecosystem

Cons: Bluetooth connectivity, pairing reliability

#5 Amazfit Active 3 Premium
4.4

Fitness tracking accuracy is generally positive, with reviewers calling activity data accurate and detailed, though some heart-rate caveats temper the overall picture.

Pros: pairing reliability, brightness

Cons: Wi-Fi connectivity, Bluetooth connectivity

#6 Amazfit Cheetah 2 Ultra
4.2

General activity performance was positive across runs, swims, and gym workouts in one review.

Pros: software smoothness, flashlight usefulness

Cons: sleep tracking accuracy, ECG functionality

#7 Amazfit Cheetah 2 Pro
4.1

Fitness tracking accuracy was generally good for recreational training and racing, though reviewers noted GPS distance quirks and not-class-leading precision.

Pros: calorie tracking usefulness, durability

Cons: ECG functionality, size options

#8 Polar Street X
4.1

Fitness tracking accuracy was generally positive where evaluated, with reviewers describing reliable metrics and good all-sports accuracy in hands-on testing.

Pros: workout tracking variety, flashlight usefulness

Cons: blood oxygen tracking, ECG functionality

#9 Amazfit T-Rex Ultra 2
4.0

Fitness accuracy looked good where reviewers discussed tracked sport detail and elevation, but the broader evidence base was thinner than for GPS or heart rate.

Pros: display quality, brightness

Cons: onboard music storage, size options