Apple Watch Series 3 vs. Polar Loop 2 vs. Casio WSD-F20A vs. Fitbit Flex vs. Pebble Core

 
Watch Series 3
Loop 2
WSD-F20A
Flex
Core
 AppleWatch Series 3Remove Buy NowPolarLoop 2Remove Buy NowCasioWSD-F20ARemove Buy NowFitbitFlexRemove Buy NowPebbleCoreRemove Buy Now

Basic Info

Suggested Price$329$120$399$100$99
Release20172015201820132016

Activity & Fitness

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

Battery

Duration18 hours8 days (without notifications)1 day5 daysNA
Rechargeable

Compatibility

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

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution340 x 272 or 390 x 312n/a320 x 320NANA
Size1.5 inches or 1.65 inchesn/a1.32 inchesNANA
TouchNANA
TypeAMOLEDLEDLCDLEDNA

Functions

Audio Speaker
Clock
PhoneNA
VibrationNA
Voice

Hardware

AccelerometerNA
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM2 ATM5 ATM1 ATMNA

Notifications

PhoneNA
EmailsNA
TextsNA

Software

Operating SystemWatchOS 4n/aWear OSNANA
Apps
Music

All Wearables