Polar M400 vs. Xiaomi Mi Band 2 vs. Jawbone UP2 vs. Xiaomi Mi Band 4

 
M400
Mi Band 2
UP2
Mi Band 4
 PolarM400Remove Buy NowXiaomiMi Band 2Remove Buy NowJawboneUP2Remove Buy NowXiaomiMi Band 4Remove Buy Now

Basic Info

Suggested Price$200$23$100$25
Release2014201620152019

Activity & Fitness

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

Battery

Duration8 hours to 30 days20 hours7 days20 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/aNA
Macn/aNA
Windowsn/aNA

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolutionn/an/aNA120x240
Sizen/a0.42 inchesNA0.95 inches
TouchNA
Typen/aOLEDNAAMOLED

Functions

Audio SpeakerAlerts only
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance3 ATMIP67Splash resistant5 ATM

Notifications

Phone
Emails
Texts

Software

Operating Systemn/an/aNAAMAZFIT OS
Apps
Music

All Wearables