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All Amazfit T-Rex vs. ASUS ZenWatch vs. Fitbit Charge 3 vs. Garmin Garmin Venu Sq 2 vs. Nokia (Withings) Activite Sapphire vs. Polar A360 vs. Samsung Galaxy Watch
Amazfit T-Rex ASUS ZenWatch Fitbit Charge 3 Garmin Garmin Venu Sq 2 Nokia (Withings) Activite Sapphire Polar A360 Samsung Galaxy Watch

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Price and Release Date

Suggested Price$140$150$150$269$450$200$330
Release / Update2019201420182022201420152018

Activity & Fitness

Calories
Distance
Heart
VO2max (Oxygen)
Sleep
Steps
Stress mgt
Female health
Skin temp
Breath rate

Battery

Duration20 days7 days11 days8 months12 days7 days
Rechargeable

Compatibility Support

Android
iOS
Windows Phone
Macn/an/a
Windowsn/aNot yetn/a

Connectivity Support

Bluetooth
CellularComing +$
GPS
NFC$
Wi-Fi

Display

Color
Resolution360 x 360320 x 32066x18320 x 360 pixelsn/a160 x 80360 x 360
Size1.3 inches1.63 inches.721 inches1.41 inches1.3 inches1.18 inches1.2" or 1.3"
Touch
TypeAMOLEDAMOLEDOLEDAMOLEDAnalogAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATMIP555 ATM5 ATM (50 Meters)5 ATMWR305 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemBuilt-inAndroid WearFitbit OSGarmin Watch OSn/an/aTizen OS
Apps
MusicSpotify

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