Polar M400 vs. Samsung Galaxy Watch vs. Xiaomi Mi Band 4

 
M400
Galaxy Watch
Mi Band 4
 PolarM400Remove Buy NowSamsungGalaxy WatchRemove Buy NowXiaomiMi Band 4Remove Buy Now

Basic Info

Suggested Price$200$330$25
Release201420182019

Activity & Fitness

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

Battery

Duration8 hours to 30 days7 days20 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/a
Mac
Windows

Connectivity

Bluetooth
CellularNA
GPS
NFC
Wi-Fi

Display

Color
Resolutionn/a360 x 360120x240
Sizen/a1.2 inches or 1.3 inches0.95 inches
Touch
Typen/aAMOLEDAMOLED

Functions

Audio SpeakerAlerts only
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance3 ATM5 ATM5 ATM

Notifications

Phone
Emails
Texts

Software

Operating Systemn/aTizen OSAMAZFIT OS
Apps
MusicSpotify

All Wearables