Motorola Moto 360 (2nd Gen) vs. Polar M400 vs. Fitbit Ionic vs. Pebble Core vs. Amazfit T-Rex

 
Moto 360 (2nd Gen)
M400
Ionic
Core
T-Rex
 MotorolaMoto 360 (2nd Gen)Remove Buy NowPolarM400Remove Buy NowFitbitIonicRemove Buy NowPebbleCoreRemove Buy NowAmazfitT-RexRemove Buy Now

Basic Info

Suggested Price$300$200$299$99$140
Release20152014201720162019

Activity & Fitness

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

Battery

Duration1.5 days8 hours to 30 days4+ daysNA20 days
Rechargeable

Compatibility

Android
iOSNA
Windows Phonen/an/aNA
Macn/aNA
Windowsn/aNA

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution360 x 325 or 360 x 330n/a348x250NA360 x 360
Size1.37 inches or 1.56 inchesn/a1.42NA1.3 inches
TouchNA
TypeLCDn/aOLEDNAAMOLED

Functions

Audio SpeakerBluetoothAlerts only
Clock
PhoneNA
VibrationNA
Voice

Hardware

AccelerometerNA
Barometer or Altimeter
Ultraviolet Sensor
Water ResistanceIP673 ATM50mNA5 ATM

Notifications

PhoneNA
EmailsNA
TextsNA

Software

Operating SystemAndroid Wearn/aFitbit OSNABuild-in
Apps
Musicn/a

All Wearables