ASUS ZenWatch 2 vs. Fitbit Alta vs. Fitbit Charge 3 vs. Amazfit T-Rex vs. Apple Series 6

 
ZenWatch 2
Alta
Charge 3
T-Rex
Series 6
 ASUSZenWatch 2Remove Buy NowFitbitAltaRemove Buy NowFitbitCharge 3Remove Buy NowAmazfitT-RexRemove Buy NowAppleSeries 6Remove Buy Now

Basic Info

Suggested Price$150$130$150$140$399
Release20162016201820192020

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Durationn/a5 days7 days20 daysNot yet
Rechargeable

Compatibility

Android
iOS
Windows Phonen/a
Macn/a
Windowsn/aNot yet

Connectivity

Bluetooth
Cellular
GPS
NFCNA
Wi-Fi

Display

Color
Resolution320 x 320n/a66 x 18360 x 360384 x 480
Size1.63 inches or 1.45 inchn/a.721 inches1.3 inches40mm
Touchn/a
TypeAMOLEDOLEDOLEDAMOLEDMicroLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor5 ATM
Water ResistanceIP67n/a5 ATM5 ATM

Notifications

Phone
Emailsn/an/a
Textsn/a

Software

Operating SystemAndroid Wearn/aNABuild-inWatchOS 5
Apps
Music

All Wearables