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Garmin Forerunner 945 vs Fenix 6 Pro vs Vivoactive 4 Compared

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Garmin Fenix 6 Series which consists of 6 members and the Vivoactive 4 are the latest smartwatches from Garmin. These new smartwatches come with newly added fitness tracking features such as onscreen workout modes, under-water heart tracking, hydration and respiration tracking some of which are present on the older Forerunner 945. In this comparison chart, we compare the Garmin Forerunner 945 vs Fenix 6 vs Vivoactive 4 specs, features and prices, so you know the differences and which is the best for you.

Garmin Forerunner 945 vs Fenix 6 vs Vivoactive 4: Specifications Compared

 
 
Product Info
Garmin Forerunner 945 Specs and features

Garmin Forerunner 945 Specifications, Features and Price

Garmin Fenix 6 Pro Specs, prices and features

Garmin Fenix 6 Pro Specifications, Features and Price

Garmin Vivoactive 4 Specs and prices

Garmin Vivoactive 4 Specifications, Features and Price

Price $589.00 $699.99 $349.99 $293.47
ABOUT DEVICE ABOUT DEVICE ABOUT DEVICE ABOUT DEVICE
Device name Garmin Forerunner 945 Garmin Fenix 6 Pro Garmin Vivoactive 4
Device type Fitness/Sport smartwatch Fitness/Sport smartwatch Fitness/Sport smartwatch
Gender Men Men Unisex
Release date April, 2019 September, 2019 September, 2019
Predecessor Garmin Forerunner 935 Garmin Fenix 5 Plus Garmin Vivoactive 3
Successor
Versions Captain Marvel, First Avengers, Vivoactive 4, Vivoactive 4S
BODY BODY BODY BODY
Dimension 47 x 47 x 13.7 mm 47 x 47 x 14.7 mm 45.1 x 45.1 x 12.8 mm
Weight 50 grams 83 grams 50.5 grams
Shape Circular Circular Circular
Case material Fiber-reinforced polymer Fiber-reinforced polymer Fiber-reinforced polymer
Strap material Silicone Leather, Nylon, Silicone, Titanium Silicone
Bezel material Fiber-reinforced polymer DLC, Stainless steel, Titanium Stainless steel
Strap size 22 mm 22 mm 22 mm
Screen protection Corning Gorilla Glass DX Corning Gorilla Glass DX, Sapphire glass Corning Gorilla Glass 3
Water resistance Yes, 5ATM 10 ATM Yes, 5ATM
Durability test MIL-STD-810G
Swim-proof Yes, recommended Yes, recommended Yes, recommended
Color Black Black Black, Silver
DISPLAY DISPLAY DISPLAY DISPLAY
Display size 1.2 inches 1.3 inches 1.3 inches
Display type LCD, Memory-in-pixel (MIP), transflective LCD, Memory-in-pixel (MIP), transflective LCD, Memory-in-pixel (MIP), transflective
Display resolution 240 x 240 px 260 x 260 px 260 x 260 px
Pixel density
Always on Yes Yes Yes
Custom watch face Yes Yes Yes
Input type (not touchscreen), 5 Physical buttons 5 Physical buttons 2 Physical buttons, Touchscreen
CONNECTIVITY CONNECTIVITY CONNECTIVITY CONNECTIVITY
Bluetooth ANT+, Bluetooth ANT+, Bluetooth ANT+, Bluetooth v4.0
Bluetooth calling No No No
GPS Galileo, GLONASS, GPS Galileo, GLONASS, GPS Galileo, GLONASS, GPS
NFC Yes Yes Yes
Wi-Fi Yes, Wi-Fi 802.11 b/g/n Yes, Wi-Fi 802.11 b/g/n Yes, Wi-Fi 802.11 b/g/n
MEMORY MEMORY MEMORY MEMORY
RAM
ROM 8GB 32GB 4GB
Memory card slot No No No
CELLULAR CONNECTIVITY CELLULAR CONNECTIVITY CELLULAR CONNECTIVITY CELLULAR CONNECTIVITY
Technology None None None
SIM type None None None
Band
NOTIFICATIONS NOTIFICATIONS NOTIFICATIONS NOTIFICATIONS
SMS alert Yes Yes Yes
Calls alert Yes Yes Yes
Email alert Yes Yes Yes
Event reminder Yes Yes Yes
Third-party apps alert Yes Yes Yes
MEDIA MEDIA MEDIA MEDIA
Audio mp3/mp4 mp3/mp4 mp3/mp4
Bluetooth music Yes Yes Yes
Loudspeaker No No No
Microphone No No No
Camera No No No
Radio No No No
SENSORS SENSORS SENSORS SENSORS
Accelerometer Yes Yes Yes
Altimeter Yes Yes Yes
Ambient light Yes Yes Yes
Barometer Yes Yes Yes
Compass Yes Yes Yes
ECG No No No
Gyroscope Yes Yes Yes
HRM Yes Yes Yes
Pulse oximeter Yes Yes Yes
Thermometer Yes Yes Yes
Other sensors
ACTIVITY TRACKING ACTIVITY TRACKING ACTIVITY TRACKING ACTIVITY TRACKING
Blood oxygen Yes Yes Yes
Blood Pressure No No No
Calories Yes Yes Yes
Distance Yes Yes Yes
ECG tracking No No No
Fitness Level Yes Yes Yes
Heart rate monitoring Yes Yes Yes
Sleep tracking Yes Yes Yes
Steps Yes Yes Yes
Stress Yes Yes Yes
Incidental fall detection Yes Yes Yes
Menstrual cycle Yes Yes Yes
VO2 Max Yes Yes Yes
Swim-tracking Yes Yes Yes
Swim-heart tracking Yes Yes Yes
On-screen workout No Yes Yes
Sport modes Yes Yes 20
BATTERY BATTERY BATTERY BATTERY
Battery type non-removable Lithium-polymer non-removable Lithium-polymer non-removable Lithium-polymer
Battery capacity
Battery life GPS with music: up to 10hrs, Smartwatch mode: Up to 2 weeks, Ultratrac: up to 60hrs Battery saver mode: 48 days, Expedition GPS mode: 28 days, Smartwatch mode: up to 14 days GPS with music: up to 6hrs, Smartwatch mode: up to 8 days
Charging type Charging dock Charging dock Charging dock
Charging time 1-2 hours 1-2 hours 1-2 hours
Solar power No No No
PLATFORM PLATFORM PLATFORM PLATFORM
Chipset
CPU
GPU
Operating system Proprietary OS Proprietary OS Proprietary OS
MISC MISC MISC MISC
Companion app Garmin Connect Garmin Connect Garmin Connect
Compatibility Android, iOS Android 5.0+, iOS 11.0+ Android 5.0+, iOS 11.0+
Payment system Garmin Pay Garmin Pay Garmin Pay
Interchangeable strap 22 mm, Yes 22 mm, Yes 22 mm, Yes
Voice command No No No
Find my phone Yes Yes Yes
Box content Charger, Garmin Forerunner 945, Manual, Straps Charger, Garmin Fenix 6 Pro, Manual, Straps Charger, Garmin Vivoactive 4, Manual, Straps
Price $589.00 $699.99 $349.99 $293.47

Garmin Forerunner 945 vs Fenix 6 vs Vivoactive 4: Fitness Tracking Features

Garmin Forerunner 945Garmin Fenix 6Garmin Vivoactive 4
Activity Tracking Features

Steps counter, floors climbed, fitness age, Move IQ
intensity minutes and distanced traveled.
YesYesYes
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.
YesYesYes
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.
YesYesYes
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.
YesYesYes
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.
YesYesYes
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.
YesYesYes
Respiration Tracking

See how you’re breathing throughout the day, during sleep and during breath-work and yoga activities.
YesYesYes
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
YesYesYes
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.
YesYesYes
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.
NoYesYes
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.
NoYesYes
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.
YesYesYes
Garmin Coach

Get a personal running coach on your wrist, for free, to help you train for your next 5K, 10K or half-marathon.
YesYesYes
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.
YesYesYes
Gym & Fitness Equipment

Available gym profiles; Strength, Cardio and Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, Pilates and Yoga.
YesMoreFewer
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.
YesMoreFewer
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.
YesYesYes
Outdoor Recreation Features

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

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

Preloaded Ski maps allow you view run names and difficulty ratings for 2,000 worldwide ski resorts.
NoYesNo
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.
YesYesNo
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.
YesYesNo
ABC sensors

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

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

A first-of-its-kind PacePro feature helps keep you on pace with grade-adjusted guidance as you run a course.
YesYesNo
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.
YesYesYes
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.
YesMoreFewer
Underwater Wrist-based Heart Rate Tracking

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

Floors climbed
YesYesYes

Garmin Forerunner 945 vs Fenix 6 vs Vivoactive 4: Battery Life

Forerunner 945 Fenix 6 Vivoactive 4
Smartwatch Mode: Up to 2 weeks
GPS mode with music: Up to 10 hours
GPS mode without music: Up to 36 hours
Smartwatch: Up to 14 days
GPS: Up to 36 hours
Max Battery GPS Mode: 72 hours
Expedition GPS Activity: 28 days
Battery Saver Watch Mode:48 days
Smartwatch mode: Up to 7 days
GPS mode with music: Up to 5 hours
GPS mode without music: Up to 15 hours

Garmin Forerunner 945 vs Fenix 6 vs Vivoactive 4: Editor’s Pick

garmin fenix 6 pro specs, features and price

Garmin Forerunner 945 vs Fenix 6 vs Vivoactive 4: Prices Compared