Casio WSD-F10 vs. Polar M400 vs. Apple Watch Series 2 vs. Garmin 645 Music vs. Amazfit T-Rex

 
WSD-F10
M400
Watch Series 2
645 Music
T-Rex
 CasioWSD-F10Remove Buy NowPolarM400Remove Buy NowAppleWatch Series 2Remove Buy NowGarmin645 MusicRemove Buy NowAmazfitT-RexRemove Buy Now

Basic Info

Suggested Price$500$200$269$450$140
Release20162014201620182019

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heartn/an/a
Oxygenn/a
Sleepn/a
Steps
Swimn/a

Battery

Durationn/a8 hours to 30 days18 hours7 days20 days
Rechargeable

Compatibility

Android
iOSn/a
Windows Phonen/an/a
Macn/a
Windowsn/a

Connectivity

Bluetoothn/a
Cellularn/a
GPS
NFCn/a
Wi-Fin/a

Display

Color
Resolutionn/an/a340 x 272 or 390 x 312240 x 240360 x 360
Sizen/an/a1.5 inches or 1.65 inches1.2 inches1.3 inches
Touchn/a
TypeLCDn/aAMOLEDMIPAMOLED

Functions

Audio Speakern/aAlerts only
Clock
Phonen/a
Vibration
Voicen/a

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM3 ATM5ATM5 ATM5 ATM

Notifications

Phonen/a
Emailsn/a
Textsn/a

Software

Operating SystemAndroid Wearn/aWatch OSBuild-in
Appsn/a
Musicn/a

All Wearables