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

 
Watch Series 2
WSD-F20A
On Full Guard
Flex
T-Rex
 AppleWatch Series 2Remove Buy NowCasioWSD-F20ARemove Buy NowDieselOn Full GuardRemove Buy NowFitbitFlexRemove Buy NowAmazfitT-RexRemove Buy Now

Basic Info

Suggested Price$269$399$325$100$140
Release20162018201720132019

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration18 hours1 day1 day5 days20 days
Rechargeable

Compatibility

Android
iOS
Windows PhoneNA
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution340 x 272 or 390 x 312320 x 320454 x 454NA360 x 360
Size1.5 inches or 1.65 inches1.32 inches1.4 inchesNA1.3 inches
TouchNA
TypeAMOLEDLCDOMOLEDLEDAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5ATM5 ATMIP671 ATM5 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemWatch OSWear OSAndroid Wear 2.0NABuild-in
Apps
Music

All Wearables