Polar M400 vs. Withings Activite Steel vs. Garmin Forerunner 235 vs. Fitbit Flex vs. Garmin Vivofit 4

 
M400
Activite Steel
Forerunner 235
Flex
Vivofit 4
 PolarM400Remove Buy NowWithingsActivite SteelRemove Buy NowGarminForerunner 235Remove Buy NowFitbitFlexRemove Buy NowGarminVivofit 4Remove Buy Now

Basic Info

Suggested Price$200$170$299.99$100$79.95
Release20142015201720132018

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heartn/a
Oxygen
Sleep
Steps
Swim

Battery

Duration8 hours to 30 days8 months9 days5 days1 year
Rechargeable

Compatibility

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

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolutionn/an/a215 x 180NA88 x 88
Sizen/a1.3 inches1.23 inchesNANA
TouchNA
Typen/aAnalogMIPLEDNA

Functions

Audio SpeakerAlerts only
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance3 ATM5 ATM5 ATM1 ATM5 ATM

Notifications

Phone
Emails
Texts

Software

Operating Systemn/an/aNA
Apps
Music

All Wearables