Pebble Time Round vs. Polar Loop 2 vs. Casio WSD-F20A vs. Pebble Core vs. Amazfit T-Rex

 
Time Round
Loop 2
WSD-F20A
Core
T-Rex
 PebbleTime RoundRemove Buy NowPolarLoop 2Remove Buy NowCasioWSD-F20ARemove Buy NowPebbleCoreRemove Buy NowAmazfitT-RexRemove Buy Now

Basic Info

Suggested Price$200$120$399$99$140
Release20152015201820162019

Activity & Fitness

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

Battery

Duration2 days8 days (without notifications)1 dayNA20 days
Rechargeable

Compatibility

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

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolutionn/an/a320 x 320NA360 x 360
Sizeroundn/a1.32 inchesNA1.3 inches
TouchNA
Typee-paperLEDLCDNAAMOLED

Functions

Audio Speaker
Clock
PhoneNA
VibrationNA
Voice

Hardware

AccelerometerNA
Barometer or Altimeter
Ultraviolet Sensor
Water ResistanceIPX72 ATM5 ATMNA5 ATM

Notifications

PhoneNA
EmailsNA
TextsNA

Software

Operating SystemPebble OSn/aWear OSNABuild-in
Apps
Music

All Wearables