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Garmin Fenix 645 vs 645 Music Compared

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The Garmin Forerunner 645 is available in two models; the 645 music and 645. While the later lacks onboard music storage, the former comes with about 4GB onboard music storage capacity which allow you take your favorite music tracks with you. Beyond this, both are equally equipped to track your active life comprehensively with VO2 Max., incidental fall detection, menstrual cycle tracking and many more other activity tracking features. Compare the Garmin Forerunner 645 vs 645 Music to know the differences and which is the right choice for you.

Garmin Forerunner 645 vs 645 Music: Specifications Compared

 
 
Product Info
garmin forerunner 645 specifications, features and price

Garmin Forerunner 645 Specifications, Features and Price

garmin forerunner 645 specifications, features and price

Garmin Forerunner 645 Music Specifications, Features and Price

Price $399.99 $235.46 $449.99 $291.23
ABOUT DEVICE ABOUT DEVICE ABOUT DEVICE
Device name Garmin Forerunner 645 Garmin Forerunner 645 Music
Device type Fitness/Sport smartwatch Fitness/Sport smartwatch
Gender Unisex Unisex
Release date November, 2017 November, 2017
Predecessor
Successor
Versions Garmin Forerunner 645, Garmin Forerunner 645 Music Garmin Forerunner 645, Garmin Forerunner 645 Music
BODY BODY BODY
Dimension 42.5 x 42.5 x 13.5 mm 42.5 x 42.5 x 13.5 mm
Weight 41.8 grams 42.2 grams
Shape Circular Circular
Case material Fiber-reinforced polymer Fiber-reinforced polymer
Strap material Silicone Silicone
Bezel material Stainless steel Stainless steel
Strap size 20 mm 20 mm
Screen protection Corning Gorilla Glass 3 Corning Gorilla Glass 3
Water resistance Yes, 5ATM Yes, 5ATM
Durability test
Swim-proof Yes, recommended Yes, recommended
Color Black, Rose-gold, Sandstone Black, Rose-gold
DISPLAY DISPLAY DISPLAY
Display size 1.2 inches 1.2 inches
Display type LCD, Memory-in-pixel (MIP), transflective LCD, Memory-in-pixel (MIP), transflective
Display resolution 240 x 240 px 240 x 240 px
Pixel density
Always on Yes Yes
Custom watch face Yes Yes
Input type (not touchscreen), 5 Physical buttons (not touchscreen), 5 Physical buttons
CONNECTIVITY CONNECTIVITY CONNECTIVITY
Bluetooth ANT+, Bluetooth ANT+, Bluetooth
Bluetooth calling No No
GPS Galileo, GLONASS, GPS Galileo, GLONASS, GPS
NFC Yes Yes
Wi-Fi Yes, Wi-Fi 802.11 b/g/n Yes, Wi-Fi 802.11 b/g/n
MEMORY MEMORY MEMORY
RAM
ROM 4GB
Memory card slot No No
CELLULAR CONNECTIVITY CELLULAR CONNECTIVITY CELLULAR CONNECTIVITY
Technology None None
SIM type None None
Band
NOTIFICATIONS NOTIFICATIONS NOTIFICATIONS
SMS alert Yes Yes
Calls alert Yes Yes
Email alert Yes Yes
Event reminder Yes Yes
Third-party apps alert Yes Yes
MEDIA MEDIA MEDIA
Audio No mp3/mp4
Bluetooth music No Yes
Loudspeaker No No
Microphone No No
Camera No No
Radio No No
SENSORS SENSORS SENSORS
Accelerometer Yes Yes
Altimeter Yes Yes
Ambient light Yes Yes
Barometer Yes Yes
Compass Yes Yes
ECG No No
Gyroscope Yes Yes
HRM Yes Yes
Pulse oximeter No No
Thermometer Yes Yes
Other sensors
ACTIVITY TRACKING ACTIVITY TRACKING ACTIVITY TRACKING
Blood oxygen No No
Blood Pressure No No
Calories Yes Yes
Distance Yes Yes
ECG tracking No No
Fitness Level Yes Yes
Heart rate monitoring Yes Yes
Sleep tracking Yes Yes
Steps Yes Yes
Stress Yes Yes
Incidental fall detection No Yes
Menstrual cycle No
VO2 Max Yes Yes
Swim-tracking Yes Yes
Swim-heart tracking No No
On-screen workout No No
Sport modes Yes Yes
BATTERY BATTERY BATTERY
Battery type non-removable Lithium-polymer non-removable Lithium-polymer
Battery capacity
Battery life GPS mode: 14hrs, Smartwatch mode: 7 days GPS with music: 5hrs, Smartwatch mode: 7 days
Charging type Charging dock Charging dock
Charging time 1-2 hours 1-2 hours
Solar power No No
PLATFORM PLATFORM PLATFORM
Chipset
CPU
GPU
Operating system Proprietary OS Proprietary OS
MISC MISC MISC
Companion app Garmin Connect Garmin Connect
Compatibility Android, iOS Android, iOS
Payment system Garmin Pay Garmin Pay
Interchangeable strap 20mm, Yes 20mm, Yes
Voice command No No
Find my phone Yes Yes
Box content Charger, Garmin Forerunner 645, Manual, Straps Charger, Garmin Forerunner 645 Music, Manual, Straps
Price $399.99 $235.46 $449.99 $291.23

Garmin Forerunner 645 vs 645 Music: Fitness Tracking Features

Garmin Forerunner 645Garmin Forerunner 645 Music
Activity Tracking Features

Steps counter, floors climbed, fitness age, Move IQ
intensity minutes and distanced traveled.
YesYes
Body Battery Energy Monitor

Lets you see your body’s energy levels throughout the day so you can find the best times for activity and rest.
NoNo
Pulse OX Sensor

The Pulse Ox sensor gauges your blood oxygen saturation during the day and as you sleep to show how well your body is absorbing oxygen.
NoNo
Stress Tracking

Helps you find out if you’re having a calm, balanced or stressful day. Relax reminders will even prompt you to do a short breathing activity when you’re feeling stressed.
YesYes
Menstrual Cycle Tracking

Lets you use the Garmin Connect™ app to track your cycle, log physical and emotional symptoms and learn about training and nutrition during each phase of your cycle. Even get cycle tracking information on your wrist.
YesYes
Hydration Tracking

Log your daily fluid intake as a reminder to stay hydrated. You can even have an auto goal for hydration that adjusts based on how much sweat you lose during activities — even underwater.
NoNo
Respiration Tracking

See how you’re breathing throughout the day, during sleep and during breath-work and yoga activities.
NoNo
Advanced Sleep Monitoring

Get a full picture of how you’re sleeping, with a breakdown of your light, deep and REM sleep stages as well as Pulse Ox and respiration data
YesYes
Heart Rate Tracking

The watch constantly samples your heart rate2 and will alert you if it stays high while you’re at rest. It also helps gauge how hard you work during activities even underwater.
YesYes
Mindful Breathing

When you want to relax or focus, you can start a breath-work activity, and this watch will track your stress and respiration to help you get a better understanding of how you’re breathing.
NoNo
On-Screen Animated Workout Modes

Easy-to-follow, animated cardio, strength, yoga and Pilates workouts come preloaded on the watch, and you can download more from the Garmin Connect app.
NoNo
Preloaded Workout Modes

Track all the ways you move with more than 20 preloaded GPS and indoor sports apps — including walking, running, cycling, pool swimming, golf and more.
YesYes
Garmin Coach

Get a personal running coach on your wrist, for free, to help you train for your next 5K, 10K or half-marathon.
YesYes
Safety and Tracking Features

When your watch and phone are paired, your live location can be sent to your contacts manually or — during outdoor activities — automatically with built-in incident detection.

Also Livetrack, Group LiveTrack and Live event sharing allow you to invite other to join you in your training.
Yes, lacks Group LiveTrack,
Assistance and
Live event sharing
Yes, lacks Group LiveTrack,
Assistance and
Live event sharing
Gym & Fitness Equipment

Available gym profiles; Strength, Cardio and Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, Pilates and Yoga.
FewerFewer
Training, Planning and Analysis Features

Available run profiles; Running, Treadmill Running, Indoor Track Running, Trail Running.

GPS speed and distance, customizable activity profiles, advanced training, VO2 Max., heat and altitude acclimation, training load, training effect, auto and manual mutisport activities, Garmin and Strava live segments.
FewerFewer
ClimbPro Feature

Use ClimbPro ascent planner on downloaded courses to see real-time information on your current and upcoming climbs, including gradient, distance and elevation gain.
NoNo
Outdoor Recreation Features

Outdoor recreational features include hiking, climbing, mountain biking, skiing, snowboarding, XC skiing, stand up paddleboarding, rowing, kayaking, jumpmaster, tactical
FewerFewer
Multi-GNSS Support

Access multiple global navigation satellite systems (GPS, GLONASS and Galileo) to track in more challenging environments than GPS alone.
YesYes
TOPO Maps

Preloaded Topographical (TOPO) maps allow you use TOPO maps with Trendline Popularity Routing to find the best routes and navigate your adventures effortlessly
NoNo
Ski Maps

Preloaded Ski maps allow you view run names and difficulty ratings for 2,000 worldwide ski resorts.
NoNo
Round-trip Routing
Enter a distance you want to travel, and get suggested routes that will bring you back to your starting point. Trendline™ popularity routing helps you find the best local paths.
NoNo
Turn-by-turn Navigation

Follow a route or course with help from turn-by-turn directions, which let you know ahead of time when the next turn is coming.
YesYes
ABC sensors

Navigate your next trail with ABC sensors, including an altimeter for elevation data, barometer to monitor weather and three-axis electronic compass
YesYes
Running Features

Available run profiles include running, treadmill running, indoor track running, trail running
FewerFewer
PACEPRO Technology

A first-of-its-kind PacePro feature helps keep you on pace with grade-adjusted guidance as you run a course.
NoNo
Golf Courses

Access full-color CourseView maps for more than 41,000 golf courses around the world, and get button targeting and the PlaysLike Distance feature.
NoNo
Swimming Features

Available swimming profiles; pool swimming, open water swimming, swimming/running.

Other features include; tracks metrics such as distance, pace, stroke count, stroke distance and SWOLF.
FewerFewer
Underwater Wrist-based Heart Rate Tracking

Features underwater wrist-based heart rate tracking that helps you manage your swimming intensity.
NoNo
Altimeter

Floors climbed
YesYes

Garmin Forerunner 645 vs 645 Music: Battery Life

Forerunner 645 Forerunner 245 Music
Smartwatch Mode: Up to 7 days
GPS mode with music: Up to 6 hours
GPS mode without music: Up to 24 hours
Smartwatch Mode: Up to 7 days
GPS mode with music: Up to 5 hours
GPS mode without music: Up to 14 hours

Garmin Forerunner 645 vs 645 Music: Editor’s Pick

garmin forerunner 645 specifications, features and price

Garmin Forerunner 645 vs 645 Music: Prices Compared

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