Compare Smartwatches and Fitness trackers.
  Apple Watch Series 3 Garmin 645 Music Garmin Fenix 3

Compare Apple Watch Series 3 vs Garmin 645 Music vs Garmin Fenix 3

  Smartwatch Smartwatch Smartwatch
Release / Update 2017 2018 2015
Suggested Price $279 $450 $500
 

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
VO2max (Oxygen)
Sleep
Steps
Swim

Battery

Duration 18 hours 7 days 50 hours to 6 weeks
Charging Wireless charging Rechargeable Rechargeable

Compatibility

Android
iOS
Windows Phone
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution 38mm: 340x272
42mm: 390x312
240x240 218x218
Size 1.5"
1.65"
1.2" 1.2"
Touch
Type AMOLED MIP Chroma LED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice
Camera

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance 5ATM (50 metres) 5ATM (50 metres) 10ATM (100 metres)

Notifications

Phone
Emails
Texts

Software

Operating System watchOS 4.0, upgradable to 5.2.1 N/A N/A
Apps
Music

More Info & Buy

Storage
16GB, 768 MB RAM
Extra
Colors: Space Black, Silver
Build: Stainless Steel/Ceramic back
3D Touch display
Bluetooth 4.2
Pros
Apple Watch Series 3 Pros
+ Adds barometer to GPS and swimproofing
Garmin 645 Music Pros
Garmin Fenix 3 Pros
Cons
Apple Watch Series 3 Cons
- Battery life takes a major hit when making calls or during GPS workouts
Garmin 645 Music Cons
Garmin Fenix 3 Cons
 
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