Apple Watch Series 3 vs. Polar M400 vs. Fitbit Flex 2 vs. Apple Watch Series 5 vs. Garmin VivoActive 4

 
Watch Series 3
M400
Flex 2
Watch Series 5
VivoActive 4
 AppleWatch Series 3Remove Buy NowPolarM400Remove Buy NowFitbitFlex 2Remove Buy NowAppleWatch Series 5Remove Buy NowGarminVivoActive 4Remove Buy Now

Basic Info

Suggested Price$329$200$100$329$349
Release20172014201620192019

Activity & Fitness

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

Battery

Duration18 hours8 hours to 30 days5 daysNot Yet8 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/an/a
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Colorn/a
Resolution340 x 272 or 390 x 312n/an/a384 x 480260 x 260
Size1.5 inches or 1.65 inchesn/an/a1.78 Inches1.3ionches
Touchn/a
TypeAMOLEDn/aLEDMicroLEDMIP

Functions

Audio SpeakerAlerts only
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM3 ATM5 ATMNot Yet5 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemWatchOS 4n/an/aWatchOS 5Wear OS
Apps
Music

All Wearables