Apple Watch Series 3 vs. Fitbit Flex 2 vs. ASUS ZenWatch 3 vs. Asus ZenWatch vs. Fitbit Alta HR

 
Watch Series 3
Flex 2
ZenWatch 3
ZenWatch
Alta HR
 AppleWatch Series 3Remove Buy NowFitbitFlex 2Remove Buy NowASUSZenWatch 3Remove Buy NowAsusZenWatchRemove Buy NowFitbitAlta HRRemove Buy Now

Basic Info

Suggested Price$329$100$229$150$150
Release20172016201720142017

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration18 hours5 days48 hoursNA7 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/aNA
MacNA
WindowsNA

Connectivity

BluetoothYes
Cellular
GPS
NFC
Wi-Fi

Display

Colorn/a
Resolution340 x 272 or 390 x 312n/a400 x 400320 x 320128 x 36
Size1.5 inches or 1.65 inchesn/a1.39 inches1.63 inches1.4 inches
Touchn/a
TypeAMOLEDLEDAMOLEDAMOLEDOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM5 ATMIP55

Notifications

Phone
EmailsNA
TextsNA

Software

Operating SystemWatchOS 4n/aAndroid Wear 2Android Wear
Apps
Music

All Wearables