Apple Watch Series 2 Casio WSD-F10 Polar M400 Withings Activite Sapphire Fitbit Alta
  Apple Watch Series 2 Remove Buy Now Casio WSD-F10 Remove Buy Now Polar M400 Remove Buy Now Withings Activite Sapphire Remove Buy Now Fitbit Alta Remove Buy Now

Basic Info

Suggested Price $269 $500 $200 $450 $130
Release 2016 2016 2014 2014 2016

Activity & Fitness

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

Battery

Duration 18 hours n/a 8 hours to 30 days 8 months 5 days
Rechargeable

Compatibility

Android
iOS n/a
Windows Phone n/a n/a n/a
Mac n/a n/a
Windows n/a n/a

Connectivity

Bluetooth n/a
Cellular n/a
GPS
NFC n/a
Wi-Fi n/a

Display

Color
Resolution 340 x 272 or 390 x 312 n/a n/a n/a n/a
Size 1.5 inches or 1.65 inches n/a n/a 1.3 inches n/a
Touch n/a n/a
Type AMOLED LCD n/a Analog OLED

Functions

Audio Speaker n/a Alerts only
Clock
Phone n/a
Vibration
Voice n/a

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance 5ATM 5 ATM 3 ATM 5 ATM n/a

Notifications

Phone n/a
Emails n/a n/a
Texts n/a

Software

Operating System Watch OS Android Wear n/a n/a n/a
Apps n/a
Music n/a