Polar M400 vs. Polar V800 vs. Diesel On Full Guard vs. Garmin Forerunner 235 vs. Fitbit Flex

 
M400
V800
On Full Guard
Forerunner 235
Flex
 PolarM400Remove Buy NowPolarV800Remove Buy NowDieselOn Full GuardRemove Buy NowGarminForerunner 235Remove Buy NowFitbitFlexRemove Buy Now

Basic Info

Suggested Price$200$470$325$299.99$100
Release20142014201720172013

Activity & Fitness

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

Battery

Duration8 hours to 30 days13 hours to 30 days1 day9 days5 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/an/aNA
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolutionn/an/a454 x 454215 x 180NA
Sizen/an/a1.4 inches1.23 inchesNA
TouchNA
Typen/an/aOMOLEDMIPLED

Functions

Audio SpeakerAlerts onlyAlerts only
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance3 ATM3 ATMIP675 ATM1 ATM

Notifications

Phone
Emails
Texts

Software

Operating Systemn/an/aAndroid Wear 2.0NA
Apps
Music

All Wearables