Garmin Vivoactive HR vs. Garmin 645 Music vs. Diesel On Full Guard 2.5 vs. Amazfit T-Rex vs. Apple Watch Ultra

 
Vivoactive HR
645 Music
On Full Guard 2.5
T-Rex
Watch Ultra
 GarminVivoactive HRRemove Buy NowGarmin645 MusicRemove Buy NowDieselOn Full Guard 2.5Remove Buy NowAmazfitT-RexRemove Buy NowAppleWatch UltraRemove Buy Now

Basic Info

Suggested Price$250$450$325$140$799
Release20162018201820192022

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration13 hours to 8 days7 days4 days20 days36 hrs
Rechargeable

Compatibility

Android
iOS
Windows Phone
Macn/a
Windowsn/a

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution148 x 205240 x 240454x454360 x 360502x410 pixels
Size1.38 inches1.2 inches1.39 inches1.3 inches1.92 inches
Touch
Typen/aMIPAMOLED

Functions

Audio Speaker
ClockLTPO OLED Retina
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM5 ATM3 ATM5 ATM10 ATM (100 Meters)

Notifications

Phone
Emails
Texts

Software

Operating Systemn/aWear OSBuild-inWatchOS 9
Apps
Music

All Wearables