Polar M400 vs. Polar M600 vs. Amazfit Arc vs. Motorola Moto 360 (1st Gen) vs. Fitbit Flex

 
M400
M600
Arc
Moto 360 (1st Gen)
Flex
 PolarM400Remove Buy NowPolarM600Remove Buy NowAmazfitArcRemove Buy NowMotorolaMoto 360 (1st Gen)Remove Buy NowFitbitFlexRemove Buy Now

Basic Info

Suggested Price$200$330$69.99$150$100
Release20142016201620142013

Activity & Fitness

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

Battery

Duration8 hours to 30 days2 days20 days1 day5 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/an/aNANA
MacNA
WindowsNA

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolutionn/a240 x 24072 x40320 x 260NA
Sizen/a1.3 inches0.42 inches1.56 inchesNA
Touchn/aNA
Typen/aTFTOLEDLCDLED

Functions

Audio SpeakerAlerts onlyAlerts only
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance3 ATMIPX8IP67IP671 ATM

Notifications

Phone
Emails
Texts

Software

Operating Systemn/aAndroid WearAndroid WearNA
Apps
MusicNA

All Wearables