Casio WSD-F20A vs. Michael Kors Grayson vs. Polar Loop vs. Michael Kors Access Sofie HR vs. Michael Kors Grayson vs. Amazfit T-Rex

 
WSD-F20A
Grayson
Loop
Access Sofie HR
Grayson
T-Rex
 CasioWSD-F20ARemove Buy NowMichael KorsGraysonRemove Buy NowPolarLoopRemove Buy NowMichael KorsAccess Sofie HRRemove Buy NowMichael KorsGraysonRemove Buy NowAmazfitT-RexRemove Buy Now

Basic Info

Suggested Price$399$350$100$395$350$140
Release201820182013201920182019

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration1 day24 hours5 days2 days24 hours20 days
Rechargeable

Compatibility

Android
iOS
Windows PhoneNA
MacNA
WindowsNA

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution320 x 320453 x 454NA390 x 390453x454360 x 360
Size1.32 inches1.39 inchesNA1.19 inches1.39 inches1.3 inches
Touch
TypeLCDAMOLEDLEDOMOLEDAMOLEDAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM1 ATM2 ATM0.3 ATM1 ATM5 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemWear OSAndroid WearNAWear OSAndroid WearBuild-in
Apps
Music

All Wearables