Polar M600 vs. Polar Loop 2 vs. Michael Kors Grayson vs. Fitbit Flex vs. Jaybird Reign vs. Michael Kors Grayson

 
M600
Loop 2
Grayson
Flex
Reign
Grayson
 PolarM600Remove Buy NowPolarLoop 2Remove Buy NowMichael KorsGraysonRemove Buy NowFitbitFlexRemove Buy NowJaybirdReignRemove Buy NowMichael KorsGraysonRemove Buy Now

Basic Info

Suggested Price$330$120$350$100$150$350
Release201620152018201320152018

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heartn/a
Oxygen
Sleep
Steps
Swim

Battery

Duration2 days8 days (without notifications)24 hours5 days5 days24 hours
Rechargeable

Compatibility

Android
iOS
Windows Phonen/an/aNANA
Macn/aNA
Windowsn/aNA

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution240 x 240n/a453 x 454NANA453x454
Size1.3 inchesn/a1.39 inchesNANA1.39 inches
Touchn/aNANA
TypeTFTLEDAMOLEDLEDLEDAMOLED

Functions

Audio SpeakerAlerts only
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water ResistanceIPX82 ATM1 ATM1 ATMNA1 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemAndroid Wearn/aAndroid WearNANAAndroid Wear
Apps
Music

All Wearables