Garmin Forerunner 935 vs. Garmin 645 Music vs. Garmin Forerunner 235 vs. Fitbit Flex vs. Polar A370

 
Forerunner 935
645 Music
Forerunner 235
Flex
A370
 GarminForerunner 935Remove Buy NowGarmin645 MusicRemove Buy NowGarminForerunner 235Remove Buy NowFitbitFlexRemove Buy NowPolarA370Remove Buy Now

Basic Info

Suggested Price$500$450$299.99$100$179.95
Release20172018201720132017

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

DurationUp to 2 weeks7 days9 days5 daysUp to 3 days
Rechargeable

Compatibility

Android
iOS
Windows PhoneNA
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution240 x 240240 x 240215 x 180NA160 x 80
Size1.2 inches1.2 inches1.23 inchesNA1.18 inches
TouchNA
TypeLCDMIPMIPLEDTFT LCD

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM5 ATM5 ATM1 ATMWR30

Notifications

Phone
Emails
Texts

Software

Operating SystemNA
Apps
Music

All Wearables