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Wearable comparison / Garmin / Forerunner 255
GARMIN

Forerunner 255

WatchPremiumreleased 2022

Key specs

Battery
14 d · GPS 30 h14 days smartwatch; GPS-only 30h; all-systems+multiband 16h (46mm)
Display
Transflective MIP · always-on
Water resistance
5ATM (swim)
GPS
Multi-band
Weight
49 g
Case size
46mm
Works with
iOS + Android
Subscription
Not required · Garmin Connectfree; no paywall
Extras
Contactless pay

What it tracks

Heart & vitals

Resting heart rateHigh accuracy
HRVHigh accuracy
Blood oxygen (SpO2)High accuracy
Respiratory rateHigh accuracy

Sleep

Sleep durationHigh accuracy
Sleep stagesHigh accuracy
Sleep scoreHigh accuracy

Activity

StepsConsumer
Active minutesConsumer
CaloriesConsumer
WorkoutsHigh accuracy
Floorstracked
Distancetracked

Fitness

VO2maxtracked
Training loadtracked
Recovery / readinesstracked
Energy / Body BatteryHigh accuracy
All-day stressHigh accuracy
Screening, not a medical diagnosis. This device offers SpO2. These are wellness screening features, not a substitute for a clinical evaluation.

Sources

https://www.garmin.com/en-US/p/780139/
https://www.dcrainmaker.com/2022/06/garmin-forerunner-multisport.html
If you want to go deeper

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