Garmin Forerunner 225 vs. Fitbit Flex 2 vs. Garmin 645 Music vs. Garmin Chronos vs. Garmin Vivosmart 4

 
Forerunner 225
Flex 2
645 Music
Chronos
Vivosmart 4
 GarminForerunner 225Remove Buy NowFitbitFlex 2Remove Buy NowGarmin645 MusicRemove Buy NowGarminChronosRemove Buy NowGarminVivosmart 4Remove Buy Now

Basic Info

Suggested Price$300$100$450$1500$130
Release20152016201820182018

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration10 hours to 4 weeks5 days7 days8 days7 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/an/a
Macn/a
Windowsn/a

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Colorn/a
Resolution180 x 180n/a240 x 240218 x 21848 x 128
Size1 inchn/a1.2 inches1.2 inches0.74 inches
Touchn/a
Typen/aLEDMIPMIPOLED

Functions

Audio Speaker22
Clock
Phonen/a
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM5 ATM5 ATM10 ATM5 ATM

Notifications

Phonen/a
Emailsn/a
Textsn/a

Software

Operating Systemn/an/aWear OS
Appsn/a
Musicn/a

All Wearables