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

 
M400
On Full Guard
Forerunner 235
Flex
Reign
 PolarM400Remove Buy NowDieselOn Full GuardRemove Buy NowGarminForerunner 235Remove Buy NowFitbitFlexRemove Buy NowJaybirdReignRemove Buy Now

Basic Info

Suggested Price$200$325$299.99$100$150
Release20142017201720132015

Activity & Fitness

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

Battery

Duration8 hours to 30 days1 day9 days5 days5 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/aNANA
MacNA
WindowsNA

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolutionn/a454 x 454215 x 180NANA
Sizen/a1.4 inches1.23 inchesNANA
TouchNANA
Typen/aOMOLEDMIPLEDLED

Functions

Audio SpeakerAlerts only
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance3 ATMIP675 ATM1 ATMNA

Notifications

Phone
Emails
Texts

Software

Operating Systemn/aAndroid Wear 2.0NANA
Apps
Music

All Wearables