Fitbit Flex 2 vs. Garmin 645 Music vs. Garmin Forerunner 235 vs. Garmin Vivosmart HR Plus vs. Garmin Vivosmart 4

 
Flex 2
645 Music
Forerunner 235
Vivosmart HR Plus
Vivosmart 4
 FitbitFlex 2Remove Buy NowGarmin645 MusicRemove Buy NowGarminForerunner 235Remove Buy NowGarminVivosmart HR PlusRemove Buy NowGarminVivosmart 4Remove Buy Now

Basic Info

Suggested Price$100$450$299.99$179$130
Release20162018201720172018

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration5 days7 days9 days5 days7 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/a
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Colorn/a
Resolutionn/a240 x 240215 x 180160 x 6848 x 128
Sizen/a1.2 inches1.23 inches0.5 inches x 0.8 inches0.74 inches
Touchn/a
TypeLEDMIPMIPLCDOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

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

Notifications

Phone
Emails
Texts

Software

Operating Systemn/aNA
Apps
Music

All Wearables