Garmin Forerunner 735XT vs. Garmin Vivoactive HR vs. Garmin 645 Music vs. Fitbit Flex vs. Apple Watch Series 4

 
Forerunner 735XT
Vivoactive HR
645 Music
Flex
Watch Series 4
 GarminForerunner 735XTRemove Buy NowGarminVivoactive HRRemove Buy NowGarmin645 MusicRemove Buy NowFitbitFlexRemove Buy NowAppleWatch Series 4Remove Buy Now

Basic Info

Suggested Price$450$250$450$100$329
Release20162016201820132018

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration14 hours to 11 days13 hours to 8 days7 days5 daysNot Yet
Rechargeable

Compatibility

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

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution215 x 180148 x 205240 x 240NA384 x 480
Size1.23 inches1.38 inches1.2 inchesNA1.78 inches
Touchn/aNA
Typen/an/aMIPLEDMicroLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM5 ATM5 ATM1 ATMNot Yet

Notifications

Phone
Emails
Texts

Software

Operating Systemn/an/aNAWatch OS 5
Apps
Music

All Wearables