Casio WSD-F20A vs. Diesel On Full Guard vs. Apple Watch Series 4 vs. Apple Watch Series 5 vs. Amazfit T-Rex

 
WSD-F20A
On Full Guard
Watch Series 4
Watch Series 5
T-Rex
 CasioWSD-F20ARemove Buy NowDieselOn Full GuardRemove Buy NowAppleWatch Series 4Remove Buy NowAppleWatch Series 5Remove Buy NowAmazfitT-RexRemove Buy Now

Basic Info

Suggested Price$399$325$329$329$140
Release20182017201820192019

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration1 day1 dayNot YetNot Yet20 days
Rechargeable

Compatibility

Android
iOS
Windows Phone
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution320 x 320454 x 454384 x 480384 x 480360 x 360
Size1.32 inches1.4 inches1.78 inches1.78 Inches1.3 inches
Touch
TypeLCDOMOLEDMicroLEDMicroLEDAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATMIP67Not YetNot Yet5 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemWear OSAndroid Wear 2.0Watch OS 5WatchOS 5Build-in
Apps
Music

All Wearables