Fitbit Flex 2 vs. Garmin Vivosmart vs. Fitbit Ionic vs. Amazfit T-Rex

 
Flex 2
Vivosmart
Ionic
T-Rex
 FitbitFlex 2Remove Buy NowGarminVivosmartRemove Buy NowFitbitIonicRemove Buy NowAmazfitT-RexRemove Buy Now

Basic Info

Suggested Price$100$170$299$140
Release2016201420172019

Activity & Fitness

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

Battery

Duration5 days7 days4+ days20 days
Rechargeable

Compatibility

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

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Colorn/a
Resolutionn/a128 x 16348x250360 x 360
Sizen/a1.41 inches1.421.3 inches
Touchn/a
TypeLEDOLEDOLEDAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM5 ATM50m5 ATM

Notifications

Phone
Emails
Texts

Software

Operating Systemn/an/aFitbit OSBuild-in
Apps
Music

All Wearables