Fitbit Flex 2 vs. Amazfit Stratos vs. Asus VivoWatch vs. Garmin 645 Music vs. Garmin Forerunner 235

 
Flex 2
Stratos
VivoWatch
645 Music
Forerunner 235
 FitbitFlex 2Remove Buy NowAmazfitStratosRemove Buy NowAsusVivoWatchRemove Buy NowGarmin645 MusicRemove Buy NowGarminForerunner 235Remove Buy Now

Basic Info

Suggested Price$100$199$160$450$299.99
Release20162018201820182017

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration5 days5 days24 hours to 10 days7 days9 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/aNA
MacNA
WindowsNA

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Colorn/a
Resolutionn/a320 x 300128 x 128240 x 240215 x 180
Sizen/a1.34 inchesNA1.2 inches1.23 inches
Touchn/a
TypeLEDOLEDNAMIPMIP

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or AltimeterNA
Ultraviolet Sensor
Water Resistance5 ATM5 ATMIP675 ATM5 ATM

Notifications

Phone
Emails
Texts

Software

Operating Systemn/aProprietaryKoodOS
Apps
Music

All Wearables