Polar M600 vs. Garmin 645 Music vs. Garmin Forerunner 45 vs. HTC re Grip vs. Fitbit Sense 2

 
M600
645 Music
Forerunner 45
re Grip
Sense 2
 PolarM600Remove Buy NowGarmin645 MusicRemove Buy NowGarminForerunner 45Remove Buy NowHTCre GripRemove Buy NowFitbitSense 2Remove Buy Now

Basic Info

Suggested Price$330$450$199$199$300
Release20162018201920202022

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration2 days7 days7 days5 hours to 2.5 days6 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/aNA
MacNA
WindowsNA

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution240 x 240240 x 240208 x 208160 x 32336x336
Size1.3 inches1.2 inches1.04 inches1.8 inches1.59 inches
Touchn/a
TypeTFTMIPLCDPMOLEDAMOLED

Functions

Audio SpeakerAlerts only
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water ResistanceIPX85 ATM5 ATMIP575 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemAndroid WearBuilt-inNA
Apps
Music

All Wearables