Garmin 645 Music vs. Garmin Fenix 5X vs. Garmin Forerunner 235 vs. Fitbit Flex vs. Amazfit T-Rex

 
645 Music
Fenix 5X
Forerunner 235
Flex
T-Rex
 Garmin645 MusicRemove Buy NowGarminFenix 5XRemove Buy NowGarminForerunner 235Remove Buy NowFitbitFlexRemove Buy NowAmazfitT-RexRemove Buy Now

Basic Info

Suggested Price$450$699$299.99$100$140
Release20182017201720132019

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration7 daysUp to 12 days9 days5 days20 days
Rechargeable

Compatibility

Android
iOS
Windows PhoneNA
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution240 x 240240 x240215 x 180NA360 x 360
Size1.2 inches1.2 inches1.23 inchesNA1.3 inches
TouchNA
TypeMIPNAMIPLEDAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM10 ATM5 ATM1 ATM5 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemNABuild-in
Apps
Music

All Wearables