Fitbit VersaSamsung Galaxy Watch Active
Tech specs 
SizeDimensions: 39.36 x 37.65 x 11.2mm
Large: Fits wrists 180 mm - 220 mm in circumference
Small: Fits wrists 140 mm - 180 mm in circumference
40mm, 39.5 x 39.5 x 10.5mm (H x W x D)
MaterialThe Fitbit Versa classic band is made of a flexible, durable material similar to that used in many sports watches, and includes an aluminum watch case and buckle.Case Material: Aluminium
Strap: Fluoroelastomer
Case Crystal: Gorilla Glass
ChargingUSBWireless Charging
Battery life4+ days. Charge time (0-100%): 2 hours.45 hours (90 hours low usage)
Water-resistanceup to 50 metres (swim-proof) - 5 ATM5 ATM
Weight38 grams25 grams
Sensor3-axis accelerometer, 3-axis gyroscope, optical heart rate monitor, altimeter, ambient light sensor, vibration motor, Pulse Ox, wi-Fi antenna (802.11 b/g/n), NFC (some versions)Accelerometer, Barometer, Gyro Sensor, HR Sensor, Light Sensor, GPS (Glonass,Beidou,Galileo), NFC
DisplayHi-res touchscreen (up to 1000 nits). Corning Gorilla Glass 3 display. 300x300 pixel resolution.Super AMOLED, 360 x 360 pixel resolution
Screen size1.34 inches1.1" (28.1mm)
ColorsComes in a number of different versionsBlack, Green, Rose Gold, Silver
Other- Saves 7 days of detailed motion data – minute by minute.
- Saves daily totals for past 30 days
Operating system: Tizen 4.0
Processor: Exynos 9110 Dual core 1.15GHz
Memory: 768MB RAM + 4GB Internal Memory
Connectivity: 3G/LTE, Bluetooth®4.2, 802.11 b/g/n 2.4GHz, NFC, A-GPS/Glonass
Activity tracking 
Calories burnedYesYes
SleepYes (light, deep & REM)Yes
Heart rateYes + HRV (premium subscription)Yes
Stress & recoveryYes
Pulse OxYes
Respiration rateYes (premium subscription)
UV exposure
Skin temperatureYes (premium subscription)
Galvanic skin response
Hydration level
Calorie intakeYes (through the app)
Running features
Swimming features
Other - Guided breathing sessions
- Female health tracking
Monitors blood pressure through an optional research app.
Non-fitness functions 
Smartphone notificationsCall, text and calendar notificationsYes
On-board music storageYes, 2.5GB (300 songs) + access PandoraYes
Connected payYesYes
Affiliate link*Amazon | FitbitAmazon | Samsung
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