ASUS ZenWatch 3 vs. Fitbit Ionic vs. Garmin Fenix 5 vs. Garmin 645 Music vs. Amazfit T-Rex

 
ZenWatch 3
Ionic
Fenix 5
645 Music
T-Rex
 ASUSZenWatch 3Remove Buy NowFitbitIonicRemove Buy NowGarminFenix 5Remove Buy NowGarmin645 MusicRemove Buy NowAmazfitT-RexRemove Buy Now

Basic Info

Suggested Price$229$299$599.99$450$140
Release20172017201720182019

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration48 hours4+ days2 Weeks7 days20 days
Rechargeable

Compatibility

Android
iOS
Windows Phone
Mac
Windows

Connectivity

BluetoothYes
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution400 x 400348x250240 x 240240 x 240360 x 360
Size1.39 inches1.421.2 inches1.2 inches1.3 inches
Touch
TypeAMOLEDOLEDnaMIPAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance50m10 ATM5 ATM5 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemAndroid Wear 2Fitbit OSBuild-in
Apps
Music

All Wearables