Fitbit Flex 2 vs. Sony SmartBand 2 vs. Casio G-Shock GBA800 vs. Michael Kors Grayson vs. Polar A370 vs. Michael Kors Grayson

 
Flex 2
SmartBand 2
G-Shock GBA800
Grayson
A370
Grayson
 FitbitFlex 2Remove Buy NowSonySmartBand 2Remove Buy NowCasioG-Shock GBA800Remove Buy NowMichael KorsGraysonRemove Buy NowPolarA370Remove Buy NowMichael KorsGraysonRemove Buy Now

Basic Info

Suggested Price$100$130$120$350$179.95$350
Release201620152018201820172018

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration5 days2 days2 years24 hoursUp to 3 days24 hours
Rechargeable

Compatibility

Android
iOS
Windows Phonen/an/a
Macn/a
Windowsn/a

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Colorn/an/a
Resolutionn/an/a453 x 454160 x 80453x454
Sizen/an/a1.39 inches1.18 inches1.39 inches
Touchn/an/a
TypeLEDn/aAMOLEDTFT LCDAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATMIP5820 ATM1 ATMWR301 ATM

Notifications

Phone
Emails
Texts

Software

Operating Systemn/an/aAndroid WearAndroid Wear
Apps
Music

All Wearables