Casio WSD-F20A vs. Fitbit Versa vs. Fitbit Flex vs. Garmin Forerunner 45 vs. Apple Series 6

 
WSD-F20A
Versa
Flex
Forerunner 45
Series 6
 CasioWSD-F20ARemove Buy NowFitbitVersaRemove Buy NowFitbitFlexRemove Buy NowGarminForerunner 45Remove Buy NowAppleSeries 6Remove Buy Now

Basic Info

Suggested Price$399$199.99$100$199$399
Release20182018201320192020

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration1 day4 days5 days7 daysNot yet
Rechargeable

Compatibility

Android
iOS
Windows PhoneNA
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution320 x 320300 x300NA208 x 208384 x 480
Size1.32 inches1.34 inchesNA1.04 inches40mm
TouchNA
TypeLCDOLEDLEDLCDMicroLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor5 ATM
Water Resistance5 ATM5 ATM1 ATM5 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemWear OSNABuilt-inWatchOS 5
Apps
Music

All Wearables