Fitbit Alta vs. Fitbit Flex 2 vs. Garmin Forerunner 935 vs. Garmin Forerunner 45 vs. Apple Series 6

 
Alta
Flex 2
Forerunner 935
Forerunner 45
Series 6
 FitbitAltaRemove Buy NowFitbitFlex 2Remove Buy NowGarminForerunner 935Remove Buy NowGarminForerunner 45Remove Buy NowAppleSeries 6Remove Buy Now

Basic Info

Suggested Price$130$100$500$199$399
Release20162016201720192020

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration5 days5 daysUp to 2 weeks7 daysNot yet
Rechargeable

Compatibility

Android
iOS
Windows Phonen/a
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Colorn/a
Resolutionn/an/a240 x 240208 x 208384 x 480
Sizen/an/a1.2 inches1.04 inches40mm
Touchn/an/a
TypeOLEDLEDLCDLCDMicroLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor5 ATM
Water Resistancen/a5 ATM5 ATM5 ATM

Notifications

Phone
Emailsn/a
Texts

Software

Operating Systemn/an/aBuilt-inWatchOS 5
Apps
Music

All Wearables