Fitbit Flex 2 vs. Diesel On Full Guard vs. Garmin 645 Music vs. Garmin Vivosmart 3 vs. Apple Watch Ultra

 
Flex 2
On Full Guard
645 Music
Vivosmart 3
Watch Ultra
 FitbitFlex 2Remove Buy NowDieselOn Full GuardRemove Buy NowGarmin645 MusicRemove Buy NowGarminVivosmart 3Remove Buy NowAppleWatch UltraRemove Buy Now

Basic Info

Suggested Price$100$325$450$139.99$799
Release20162017201820172022

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration5 days1 day7 days5 days36 hrs
Rechargeable

Compatibility

Android
iOS
Windows Phonen/a
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Colorn/a
Resolutionn/a454 x 454240 x 24064 x 128502x410 pixels
Sizen/a1.4 inches1.2 inchesNA1.92 inches
Touchn/a
TypeLEDOMOLEDMIPOLED

Functions

Audio Speaker
ClockLTPO OLED Retina
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATMIP675 ATM5 ATM10 ATM (100 Meters)

Notifications

Phone
Emails
Texts

Software

Operating Systemn/aAndroid Wear 2.0WatchOS 9
Apps
Music

All Wearables