Casio WSD-F20A vs. Fitbit Flex vs. Amazfit T-Rex vs. Apple SE (2022) vs. Apple SE

 
WSD-F20A
Flex
T-Rex
SE (2022)
SE
 CasioWSD-F20ARemove Buy NowFitbitFlexRemove Buy NowAmazfitT-RexRemove Buy NowAppleSE (2022)Remove Buy NowAppleSERemove Buy Now

Basic Info

Suggested Price$399$100$140$249$279
Release20182013201920222020

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration1 day5 days20 daysNot yet18 hours
Rechargeable

Compatibility

Android
iOS
Windows PhoneNA
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color368 x 448 pixels
Resolution320 x 320NA360 x 36040mm384 x 480
Size1.32 inchesNA1.3 inches40mm
TouchNALTPO OLED Retina
TypeLCDLEDAMOLEDMicroLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter5 ATM
Ultraviolet SensorNot yet
Water Resistance5 ATM1 ATM5 ATM

Notifications

Phone
EmailsWatchOS 8.1
Texts

Software

Operating SystemWear OSNABuild-inWatchOS 5
Apps
Music

All Wearables