Apple Watch Series 3 vs. Polar M430 vs. Polar A370 vs. Diesel On Full Guard 2.5 vs. Amazfit T-Rex

 
Watch Series 3
M430
A370
On Full Guard 2.5
T-Rex
 AppleWatch Series 3Remove Buy NowPolarM430Remove Buy NowPolarA370Remove Buy NowDieselOn Full Guard 2.5Remove Buy NowAmazfitT-RexRemove Buy Now

Basic Info

Suggested Price$329$255$179.95$325$140
Release20172017201720182019

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration18 hours30 hoursUp to 3 days4 days20 days
Rechargeable

Compatibility

Android
iOS
Windows Phone
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution340 x 272 or 390 x 312128x128160 x 80454x454360 x 360
Size1.5 inches or 1.65 inches1.4 inch1.18 inches1.39 inches1.3 inches
Touch
TypeAMOLEDLCDTFT LCDAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATMWR30WR303 ATM5 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemWatchOS 4Wear OSBuild-in
Apps
Music

All Wearables