Polar M400 vs. ASUS ZenWatch 3 vs. Garmin Forerunner 235 vs. Fitbit Flex vs. Fitbit Inspire 3

 
M400
ZenWatch 3
Forerunner 235
Flex
Inspire 3
 PolarM400Remove Buy NowASUSZenWatch 3Remove Buy NowGarminForerunner 235Remove Buy NowFitbitFlexRemove Buy NowFitbitInspire 3Remove Buy Now

Basic Info

Suggested Price$200$229$299.99$100$100
Release20142017201720132022

Activity & Fitness

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

Battery

Duration8 hours to 30 days48 hours9 days5 days10 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/aNA
Mac
Windows

Connectivity

BluetoothYes
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolutionn/a400 x 400215 x 180NA32x18
Sizen/a1.39 inches1.23 inchesNA46 inches
TouchNA
Typen/aAMOLEDMIPLEDAMOLED

Functions

Audio SpeakerAlerts only
Clock
Phone
Vibration
Voice

Hardware

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

Notifications

Phone
Emails
Texts

Software

Operating Systemn/aAndroid Wear 2NA
Apps
Music

All Wearables