Huawei Watch 2 vs. Garmin 645 Music vs. Fitbit Alta HR vs. Fitbit Flex vs. Amazfit T-Rex

 
Watch 2
645 Music
Alta HR
Flex
T-Rex
 HuaweiWatch 2Remove Buy NowGarmin645 MusicRemove Buy NowFitbitAlta HRRemove Buy NowFitbitFlexRemove Buy NowAmazfitT-RexRemove Buy Now

Basic Info

Suggested Price$350$450$150$100$140
Release20172018201720132019

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration48 hours7 days7 days5 days20 days
Rechargeable

Compatibility

Android
iOS
Windows PhoneNA
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution480 x 480240 x 240128 x 36NA360 x 360
Size1.38 inches1.2 inches1.4 inchesNA1.3 inches
TouchNA
TypeP-OLEDMIPOLEDLEDAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water ResistanceIP685 ATM1 ATM5 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemAndroid Wear 2NABuild-in
Apps
Music

All Wearables