Polar M400 vs. ASUS ZenWatch 3 vs. Huawei Watch 2 vs. Garmin 645 Music vs. Fitbit Flex

 
M400
ZenWatch 3
Watch 2
645 Music
Flex
 PolarM400Remove Buy NowASUSZenWatch 3Remove Buy NowHuaweiWatch 2Remove Buy NowGarmin645 MusicRemove Buy NowFitbitFlexRemove Buy Now

Basic Info

Suggested Price$200$229$350$450$100
Release20142017201720182013

Activity & Fitness

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

Battery

Duration8 hours to 30 days48 hours48 hours7 days5 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/aNA
Mac
Windows

Connectivity

BluetoothYes
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolutionn/a400 x 400480 x 480240 x 240NA
Sizen/a1.39 inches1.38 inches1.2 inchesNA
TouchNA
Typen/aAMOLEDP-OLEDMIPLED

Functions

Audio SpeakerAlerts only
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance3 ATMIP685 ATM1 ATM

Notifications

Phone
Emails
Texts

Software

Operating Systemn/aAndroid Wear 2Android Wear 2NA
Apps
Music

All Wearables