Apple Watch Series 3 vs. Amazfit Bip vs. Garmin 645 Music vs. Fitbit Inspire HR vs. Amazfit T-Rex

 
Watch Series 3
Bip
645 Music
Inspire HR
T-Rex
 AppleWatch Series 3Remove Buy NowAmazfitBipRemove Buy NowGarmin645 MusicRemove Buy NowFitbitInspire HRRemove Buy NowAmazfitT-RexRemove Buy Now

Basic Info

Suggested Price$329$99.99$450$99$140
Release20172018201820192019

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration18 hours30 days7 days5 days20 days
Rechargeable

Compatibility

Android
iOS
Windows Phone
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution340 x 272 or 390 x 312176 x 176240 x 240139 x 60360 x 360
Size1.5 inches or 1.65 inches1.28 inches1.2 inches1.4 inches1.3 inches
Touch
TypeAMOLEDNAMIPOLEDAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATMIP685 ATM5 ATM5 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemWatchOS 4Fitbit OSBuild-in
Apps
Music

All Wearables