Motorola Moto 360 (2nd Gen) vs. Polar M400 vs. Apple Watch Series 2 vs. Fitbit Flex vs. Apple Watch 7

 
Moto 360 (2nd Gen)
M400
Watch Series 2
Flex
Watch 7
 MotorolaMoto 360 (2nd Gen)Remove Buy NowPolarM400Remove Buy NowAppleWatch Series 2Remove Buy NowFitbitFlexRemove Buy NowAppleWatch 7Remove Buy Now

Basic Info

Suggested Price$300$200$269$100$429
Release20152014201620132021

Activity & Fitness

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

Battery

Duration1.5 days8 hours to 30 days18 hours5 days18 Hours
Rechargeable

Compatibility

Android
iOS
Windows Phonen/an/aNA
Macn/a
Windowsn/a

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution360 x 325 or 360 x 330n/a340 x 272 or 390 x 312NA396 x 484
Size1.37 inches or 1.56 inchesn/a1.5 inches or 1.65 inchesNA1.9 inches
TouchNA
TypeLCDn/aAMOLEDLEDMicroLED

Functions

Audio SpeakerBluetoothAlerts only
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water ResistanceIP673 ATM5ATM1 ATMwater resistant but not waterproof

Notifications

Phone
Emails
Texts

Software

Operating SystemAndroid Wearn/aWatch OSNAWatchOS 8
Apps
Musicn/a

All Wearables