Fitbit Flex 2 vs. Garmin 645 Music vs. Michael Kors Grayson vs. Pebble Core vs. Garmin Forerunner 45 vs. Michael Kors Grayson

 
Flex 2
645 Music
Grayson
Core
Forerunner 45
Grayson
 FitbitFlex 2Remove Buy NowGarmin645 MusicRemove Buy NowMichael KorsGraysonRemove Buy NowPebbleCoreRemove Buy NowGarminForerunner 45Remove Buy NowMichael KorsGraysonRemove Buy Now

Basic Info

Suggested Price$100$450$350$99$199$350
Release201620182018201620192018

Activity & Fitness

Calories
Cycling (Bicycling)NA
Distance
Heart
Oxygen
SleepNA
Steps
Swim

Battery

Duration5 days7 days24 hoursNA7 days24 hours
Rechargeable

Compatibility

Android
iOSNA
Windows Phonen/aNA
MacNA
WindowsNA

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Colorn/a
Resolutionn/a240 x 240453 x 454NA208 x 208453x454
Sizen/a1.2 inches1.39 inchesNA1.04 inches1.39 inches
Touchn/aNA
TypeLEDMIPAMOLEDNALCDAMOLED

Functions

Audio Speaker
Clock
PhoneNA
VibrationNA
Voice

Hardware

AccelerometerNA
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM5 ATM1 ATMNA5 ATM1 ATM

Notifications

PhoneNA
EmailsNA
TextsNA

Software

Operating Systemn/aAndroid WearNABuilt-inAndroid Wear
Apps
Music

All Wearables