Fitbit Ionic vs. Casio WSD-F20A vs. Garmin Forerunner 235 vs. Garmin Forerunner 45 vs. Amazfit T-Rex

 
Ionic
WSD-F20A
Forerunner 235
Forerunner 45
T-Rex
 FitbitIonicRemove Buy NowCasioWSD-F20ARemove Buy NowGarminForerunner 235Remove Buy NowGarminForerunner 45Remove Buy NowAmazfitT-RexRemove Buy Now

Basic Info

Suggested Price$299$399$299.99$199$140
Release20172018201720192019

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration4+ days1 day9 days7 days20 days
Rechargeable

Compatibility

Android
iOS
Windows Phone
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution348x250320 x 320215 x 180208 x 208360 x 360
Size1.421.32 inches1.23 inches1.04 inches1.3 inches
Touch
TypeOLEDLCDMIPLCDAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance50m5 ATM5 ATM5 ATM5 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemFitbit OSWear OSBuilt-inBuild-in
Apps
Music

All Wearables