Fitbit Ionic vs. Michael Kors Access Sofie vs. Fitbit Flex vs. Garmin Vivofit 4 vs. Amazfit T-Rex

 
Ionic
Access Sofie
Flex
Vivofit 4
T-Rex
 FitbitIonicRemove Buy NowMichael KorsAccess SofieRemove Buy NowFitbitFlexRemove Buy NowGarminVivofit 4Remove Buy NowAmazfitT-RexRemove Buy Now

Basic Info

Suggested Price$299$395$100$79.95$140
Release20172017201320182019

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration4+ days1 day5 days1 year20 days
Rechargeable

Compatibility

Android
iOS
Windows PhoneNA
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution348x250390 x 390 1.19 inchesNA88 x 88360 x 360
Size1.42NANA1.3 inches
TouchAMOLDEDNA
TypeOLEDLEDNAAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance50m1 ATM1 ATM5 ATM5 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemFitbit OSAndroid Wear 2.0NABuild-in
Apps
Music

All Wearables