Fitbit Flex 2 vs. Amazfit Arc vs. Casio WSD-F20A vs. Diesel On Full Guard vs. Amazfit T-Rex

 
Flex 2
Arc
WSD-F20A
On Full Guard
T-Rex
 FitbitFlex 2Remove Buy NowAmazfitArcRemove Buy NowCasioWSD-F20ARemove Buy NowDieselOn Full GuardRemove Buy NowAmazfitT-RexRemove Buy Now

Basic Info

Suggested Price$100$69.99$399$325$140
Release20162016201820172019

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration5 days20 days1 day1 day20 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/a
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Colorn/a
Resolutionn/a72 x40320 x 320454 x 454360 x 360
Sizen/a0.42 inches1.32 inches1.4 inches1.3 inches
Touchn/a
TypeLEDOLEDLCDOMOLEDAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATMIP675 ATMIP675 ATM

Notifications

Phone
Emails
Texts

Software

Operating Systemn/aWear OSAndroid Wear 2.0Build-in
Apps
Music

All Wearables