Apple Watch Series 3 vs. Polar M400 vs. Garmin Forerunner 935 vs. Amazfit T-Rex

 
Watch Series 3
M400
Forerunner 935
T-Rex
 AppleWatch Series 3Remove Buy NowPolarM400Remove Buy NowGarminForerunner 935Remove Buy NowAmazfitT-RexRemove Buy Now

Basic Info

Suggested Price$329$200$500$140
Release2017201420172019

Activity & Fitness

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

Battery

Duration18 hours8 hours to 30 daysUp to 2 weeks20 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/a
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution340 x 272 or 390 x 312n/a240 x 240360 x 360
Size1.5 inches or 1.65 inchesn/a1.2 inches1.3 inches
Touch
TypeAMOLEDn/aLCDAMOLED

Functions

Audio SpeakerAlerts only
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM3 ATM5 ATM5 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemWatchOS 4n/aBuild-in
Apps
Music

All Wearables