Garmin Forerunner 225 vs. Polar M400 vs. Fitbit Alta vs. Amazfit Stratos vs. Fitbit Flex

 
Forerunner 225
M400
Alta
Stratos
Flex
 GarminForerunner 225Remove Buy NowPolarM400Remove Buy NowFitbitAltaRemove Buy NowAmazfitStratosRemove Buy NowFitbitFlexRemove Buy Now

Basic Info

Suggested Price$300$200$130$199$100
Release20152014201620182013

Activity & Fitness

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

Battery

Duration10 hours to 4 weeks8 hours to 30 days5 days5 days5 days
Rechargeable

Compatibility

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

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution180 x 180n/an/a320 x 300NA
Size1 inchn/an/a1.34 inchesNA
Touchn/aNA
Typen/an/aOLEDOLEDLED

Functions

Audio Speaker22Alerts only
Clock
Phonen/a
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM3 ATMn/a5 ATM1 ATM

Notifications

Phonen/a
Emailsn/an/a
Textsn/a

Software

Operating Systemn/an/an/aProprietaryNA
Appsn/a
Musicn/a

All Wearables