Casio WSD-F20A vs. Diesel On Full Guard vs. Fitbit Alta HR vs. Fitbit Flex vs. Apple Watch Series 4

 
WSD-F20A
On Full Guard
Alta HR
Flex
Watch Series 4
 CasioWSD-F20ARemove Buy NowDieselOn Full GuardRemove Buy NowFitbitAlta HRRemove Buy NowFitbitFlexRemove Buy NowAppleWatch Series 4Remove Buy Now

Basic Info

Suggested Price$399$325$150$100$329
Release20182017201720132018

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration1 day1 day7 days5 daysNot Yet
Rechargeable

Compatibility

Android
iOS
Windows PhoneNA
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution320 x 320454 x 454128 x 36NA384 x 480
Size1.32 inches1.4 inches1.4 inchesNA1.78 inches
TouchNA
TypeLCDOMOLEDOLEDLEDMicroLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATMIP671 ATMNot Yet

Notifications

Phone
Emails
Texts

Software

Operating SystemWear OSAndroid Wear 2.0NAWatch OS 5
Apps
Music

All Wearables