Image of a Watch Series 2
Image of a WSD-F10
Image of a M400
Image of a Stratos
Image of a WSD-F20A
 AppleWatch Series 2Remove Buy NowCasioWSD-F10Remove Buy NowPolarM400Remove Buy NowAmazfitStratosRemove Buy NowCasioWSD-F20ARemove Buy Now

Basic Info

Suggested Price$269$500$200$199$399
Release20162016201420182018

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heartn/an/a
Oxygenn/a
Sleepn/a
Steps
Swimn/a

Battery

Duration18 hoursn/a8 hours to 30 days5 days1 day
Rechargeable

Compatibility

Android
iOSn/a
Windows Phonen/an/a
Macn/a
Windowsn/a

Connectivity

Bluetoothn/a
Cellularn/a
GPS
NFCn/a
Wi-Fin/a

Display

Color
Resolution340 x 272 or 390 x 312n/an/a320 x 300320 x 320
Size1.5 inches or 1.65 inchesn/an/a1.34 inches1.32 inches
Touchn/a
TypeAMOLEDLCDn/aOLEDLCD

Functions

Audio Speakern/aAlerts only
Clock
Phonen/a
Vibration
Voicen/a

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5ATM5 ATM3 ATM5 ATM5 ATM

Notifications

Phonen/a
Emailsn/a
Textsn/a

Software

Operating SystemWatch OSAndroid Wearn/aProprietaryWear OS
Appsn/a
Musicn/a

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