Casio WSD-F20A vs. Fitbit Flex vs. Polar A370 vs. Garmin Vivosmart 4

 
WSD-F20A
Flex
A370
Vivosmart 4
 CasioWSD-F20ARemove Buy NowFitbitFlexRemove Buy NowPolarA370Remove Buy NowGarminVivosmart 4Remove Buy Now

Basic Info

Suggested Price$399$100$179.95$130
Release2018201320172018

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration1 day5 daysUp to 3 days7 days
Rechargeable

Compatibility

Android
iOS
Windows PhoneNA
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution320 x 320NA160 x 8048 x 128
Size1.32 inchesNA1.18 inches0.74 inches
TouchNA
TypeLCDLEDTFT LCDOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM1 ATMWR305 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemWear OSNA
Apps
Music

All Wearables