Polar M600 vs. Garmin 645 Music vs. Michael Kors Grayson vs. Polar A370 vs. Michael Kors Grayson vs. HTC re Grip

 
M600
645 Music
Grayson
A370
Grayson
re Grip
 PolarM600Remove Buy NowGarmin645 MusicRemove Buy NowMichael KorsGraysonRemove Buy NowPolarA370Remove Buy NowMichael KorsGraysonRemove Buy NowHTCre GripRemove Buy Now

Basic Info

Suggested Price$330$450$350$179.95$350$199
Release201620182018201720182020

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration2 days7 days24 hoursUp to 3 days24 hours5 hours to 2.5 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/aNA
MacNA
WindowsNA

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution240 x 240240 x 240453 x 454160 x 80453x454160 x 32
Size1.3 inches1.2 inches1.39 inches1.18 inches1.39 inches1.8 inches
Touchn/a
TypeTFTMIPAMOLEDTFT LCDAMOLEDPMOLED

Functions

Audio SpeakerAlerts only
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water ResistanceIPX85 ATM1 ATMWR301 ATMIP57

Notifications

Phone
Emails
Texts

Software

Operating SystemAndroid WearAndroid WearAndroid WearNA
Apps
Music

All Wearables