Polar M400 vs. Pebble Time 2 vs. Polar A370 vs. Garmin Forerunner 45 vs. Amazfit GTR

 
M400
Time 2
A370
Forerunner 45
GTR
 PolarM400Remove Buy NowPebbleTime 2Remove Buy NowPolarA370Remove Buy NowGarminForerunner 45Remove Buy NowAmazfitGTRRemove Buy Now

Basic Info

Suggested Price$200$199$179.95$199$199
Release20142016201720192019

Activity & Fitness

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

Battery

Duration8 hours to 30 days10 daysUp to 3 days7 days24 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/aNA
MacNA
WindowsNA

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolutionn/aNA160 x 80208 x 208454 x 454
Sizen/aNA1.18 inches1.04 inches1.39 inches
Touch
Typen/ae-paperTFT LCDLCDAMOLED

Functions

Audio SpeakerAlerts only
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance3 ATM3 ATMWR305 ATM5 ATM

Notifications

Phone
Emails
Texts

Software

Operating Systemn/aPebble OSBuilt-inBuild-in
Apps
Music

All Wearables