Garmin Forerunner 225 vs. Garmin 645 Music vs. Garmin Forerunner 235 vs. Fitbit Flex vs. Apple Series 6

 
Forerunner 225
645 Music
Forerunner 235
Flex
Series 6
 GarminForerunner 225Remove Buy NowGarmin645 MusicRemove Buy NowGarminForerunner 235Remove Buy NowFitbitFlexRemove Buy NowAppleSeries 6Remove Buy Now

Basic Info

Suggested Price$300$450$299.99$100$399
Release20152018201720132020

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration10 hours to 4 weeks7 days9 days5 daysNot yet
Rechargeable

Compatibility

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

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution180 x 180240 x 240215 x 180NA384 x 480
Size1 inch1.2 inches1.23 inchesNA40mm
TouchNA
Typen/aMIPMIPLEDMicroLED

Functions

Audio Speaker22
Clock
Phonen/a
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor5 ATM
Water Resistance5 ATM5 ATM5 ATM1 ATM

Notifications

Phonen/a
Emailsn/a
Textsn/a

Software

Operating Systemn/aNAWatchOS 5
Appsn/a
Musicn/a

All Wearables