Casio WSD-F20A vs. Fossil Explorist vs. Garmin 645 Music vs. Fitbit Alta HR vs. Apple Series 6

 
WSD-F20A
Explorist
645 Music
Alta HR
Series 6
 CasioWSD-F20ARemove Buy NowFossilExploristRemove Buy NowGarmin645 MusicRemove Buy NowFitbitAlta HRRemove Buy NowAppleSeries 6Remove Buy Now

Basic Info

Suggested Price$399$255$450$150$399
Release20182018201820172020

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration1 day24 hours7 days7 daysNot yet
Rechargeable

Compatibility

Android
iOS
Windows Phone
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution320 x 320454 x454240 x 240128 x 36384 x 480
Size1.32 inches1.4 inches1.2 inches1.4 inches40mm
Touch
TypeLCDAMOLEDMIPOLEDMicroLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor5 ATM
Water Resistance5 ATMIP675 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemWear OSWear OSWatchOS 5
Apps
Music

All Wearables