Fitbit Charge 2 vs. Fitbit Flex 2 vs. Apple Watch Series 2 vs. ASUS ZenWatch 3 vs. Amazfit Stratos

 
Charge 2
Flex 2
Watch Series 2
ZenWatch 3
Stratos
 FitbitCharge 2Remove Buy NowFitbitFlex 2Remove Buy NowAppleWatch Series 2Remove Buy NowASUSZenWatch 3Remove Buy NowAmazfitStratosRemove Buy Now

Basic Info

Suggested Price$150$100$269$229$199
Release20162016201620172018

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration5 days5 days18 hours48 hours5 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/a
Mac
Windows

Connectivity

BluetoothYes
Cellular
GPS
NFC
Wi-Fi

Display

Colorn/a
Resolutionn/an/a340 x 272 or 390 x 312400 x 400320 x 300
Sizen/an/a1.5 inches or 1.65 inches1.39 inches1.34 inches
Touchn/an/a
TypeOLEDLEDAMOLEDAMOLEDOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistancen/a5 ATM5ATM5 ATM

Notifications

Phone
Emails
Texts

Software

Operating Systemn/an/aWatch OSAndroid Wear 2Proprietary
Apps
Music

All Wearables