Garmin Forerunner 225 vs. Fitbit Ionic vs. Diesel On Full Guard vs. Fitbit Flex vs. Apple Watch Series 4

 
Forerunner 225
Ionic
On Full Guard
Flex
Watch Series 4
 GarminForerunner 225Remove Buy NowFitbitIonicRemove Buy NowDieselOn Full GuardRemove Buy NowFitbitFlexRemove Buy NowAppleWatch Series 4Remove Buy Now

Basic Info

Suggested Price$300$299$325$100$329
Release20152017201720132018

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration10 hours to 4 weeks4+ days1 day5 daysNot Yet
Rechargeable

Compatibility

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

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution180 x 180348x250454 x 454NA384 x 480
Size1 inch1.421.4 inchesNA1.78 inches
TouchNA
Typen/aOLEDOMOLEDLEDMicroLED

Functions

Audio Speaker22
Clock
Phonen/a
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM50mIP671 ATMNot Yet

Notifications

Phonen/a
Emailsn/a
Textsn/a

Software

Operating Systemn/aFitbit OSAndroid Wear 2.0NAWatch OS 5
Appsn/a
Musicn/a

All Wearables