Product Comparison

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Forerunner® 735XT
$349.99 USD and Up
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fēnix® Chronos
$899.99 USD and Up
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fēnix® 3 HR
$549.99 USD and Up
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Forerunner® 735XT
$349.99 USD and Up
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fēnix® Chronos
$899.99 USD and Up
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fēnix® 3 HR
$549.99 USD and Up

You're a serious triathlete. You want advanced running dynamics at a lower cost. This GPS running watch will show you the way.

Luxury GPS multisport watch with Sapphire lens and wrist-based heart rate

Rugged GPS multisport watch with Sapphire lens and wrist-based heart rate

General

Lens Material

chemically strengthened glass

sapphire crystal

domed sapphire crystal
 

Bezel Material

stainless steel or titanium

stainless steel

Case material stainless steel or titanium fiber-reinforced polymer
QuickFit™ watch band compatible

yes (26 mm)

Quick Release bands yes (22 mm, Industry standard)
Strap material

silicone

silicone, steel, titanium or leather

silicone

Physical size

44.5 x 44.5 x 11.9 mm

49 x 49 x 15 mm

51 x 51 x 17.5 mm

Color display
Display size 1.23" (31.1 mm) diameter 1.2” (30.4 mm) diameter 1.2” (30.4 mm) diameter
Display resolution 215 x 180 pixels 218 x 218 pixels 218 x 218 pixels
Display type sunlight-visible, transflective memory-in-pixel (MIP) sunlight-visible, transflective memory-in-pixel (MIP) sunlight-visible, transflective memory-in-pixel (MIP)
Weight

40.2 g

96 g
Titanium version: 76 g

86 g

Battery life Smartwatch Mode: Up to 11 days
GPS mode: Up to 14 hours
UltraTrac™ mode: Up to 24 hours without wrist heart rate
Smartwatch mode: Up to 8 days
GPS mode: Up to 13 hours
UltraTrac™ mode: Up to 25 hours without wrist heart rate
Smartwatch mode: Up to 2 weeks
GPS mode: Up to 16 hours
UltraTrac™ mode: Up to 40 hours
Water rating 5 ATM 10 ATM 10 ATM
Memory/History 80 hours of activity data 64 MB 32 MB

Clock Features

Time/date
GPS Time Sync
Automatic daylight saving time
Alarm clock
Timer
Stopwatch
Chronograph
Sunrise/sunset times

Health Monitoring

Wrist-based Heart Rate (constant, every second)
Daily Resting Heart Rate
Fitness Age yes (in app)
Sleep
Hydration yes (in Garmin Connect™)
Woman's Health Tracking yes (in Garmin Connect™)

Sensors

GPS
GLONASS
Garmin Elevate™ wrist heart rate monitor
Barometric altimeter
Compass
Accelerometer
Thermometer

Daily Smart Features

Connectivity Bluetooth® Smart and ANT+® Bluetooth® Smart, ANT+®, Wi-Fi®
Connect IQ™ (downloadable watch faces, data fields, widgets and apps)
Smart notifications
Calendar
Weather
Controls smartphone music
Find My Phone
Find My Watch
VIRB® Remote
Smartphone compatibility iPhone®, Android™ iPhone®, Android™ iPhone®, Android™
Pairs with Garmin Connect™ Mobile

Safety and Tracking Features

LiveTrack
Group LiveTrack

Tactical Features

Dual grid coordinates

Activity Tracking Features

Step counter
Move bar (displays on device after a period of inactivity; walk for a couple of minutes to reset it)
Auto goal (learns your activity level and assigns a daily step goal)
Calories burned
Floors climbed
Distance traveled
Intensity minutes
TrueUp™
Move IQ™

Gym & Fitness Equipment

Available gym activity profiles Indoor Rowing Indoor Rowing

Training, Planning and Analysis Features

HR zones
HR alerts
HR calories
% HR max
% HRR
Recovery time
Auto max HR
HRV stress test (measures your heart rate variability while standing still, for 3 minutes, to provide you with an estimated stress level; the scale of this is 1 to 100; low scores indicate lower stress levels) yes (with compatible accessory) yes (with compatible accessory) yes (with compatible accessory)
HR Broadcast (broadcasts HR data over ANT+™ to paired devices)
GPS speed and distance
Customizable data pages
Customizable activity profiles
Auto Pause®
Interval training
Advanced workouts
Downloadable training plans
Auto Lap®
Manual lap
Configurable lap alerts
VO2 Max (Run)
Training Status (lets you see if you’re training effectively by tracking your training history and fitness level trend.)
Training Load (your total training load for the last 7 days calculated from estimated EPOC)
Training Effect
Training Effect (anaerobic)
Custom alerts
Audio prompts
Finish time
Virtual Partner
Race an Activity
Auto multisport activities
Manual multisport activities
Course guidance
Garmin Live Segments
Strava Live Segments
Touch and/or button lock
Hot keys
Auto scroll
Activity history on watch

Running Features

Available run profiles

yes

Running, Treadmill Running, Trail Running

Running, Indoor Running, Trail Running

GPS-based distance, time and pace
Running dynamics yes (with compatible accessory)
Vertical oscillation and ratio (the degree of 'bounce' in your running motion and the cost-benefit ratio with stride length) yes (with compatible accessory) yes (with compatible accessory) yes (with compatible accessory)
Ground contact time and balance (shows how much time, in the running motion, your foot is on the ground rather than in flight and lets you check your running symmetry) yes (with compatible accessory) yes (with compatible accessory) yes (with compatible accessory)
Stride length (real time) yes (with compatible accessory) yes (with compatible accessory) yes (with compatible accessory)
Cadence (provides real-time number of steps per minute)
Performance condition (after running 6–20 minutes, compares your real-time condition to your average fitness level)
Lactate threshold (through analysis of your pace and heart rate, estimates the point where your muscles start to rapidly fatigue) yes (with compatible accessory) yes (with compatible accessory) yes (with compatible accessory)
Run workouts
Race predictor
Foot pod capable

Golfing Features

Yardage to F/M/B (distance to front, middle and back of green)
Yardage to layups/doglegs
Measures shot distance (calculates exact yardage for shots from anywhere on course) Manual Manual
Digital scorecard
Stat tracking (strokes, putts per round, greens and fairways hit)
Garmin AutoShot™
Green View with manual pin position
Hazards and course targets
TruSwing™ compatible
Round timer/odometer

Outdoor Recreation

Available outdoor recreation profiles

Hiking, Climbing, Mountain Biking, Skiing, Snowboarding, XC Skiing, Stand Up Paddleboarding, Rowing, Jumpmaster, Tactical

Hiking, Climbing, Mountain Biking, Skiing, Snowboarding, XC Skiing, Stand Up Paddleboarding, Rowing, Jumpmaster, Tactical

Point-to-point navigation
Bread crumb trail in real time
Back to start
TracBack®
UltraTrac mode
Elevation profile
Distance to destination
Barometric trend indicator with Storm Alert
Trail run auto climb
Vertical speed
Total ascent/descent
Compatible with BaseCamp™
GPS coordinates
Sight 'N Go
Area calculation yes (via Connect IQ™) yes (via Connect IQ™)
Hunt/fish calendar yes (via Connect IQ™) yes (via Connect IQ™)
Projected waypoint
Sun and moon information yes (via Connect IQ™) yes (via Connect IQ™)
Tides yes (via Connect IQ™) yes (via Connect IQ™)

Cycling Features

Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories)
Courses
Available cycling profiles

yes

Biking, Indoor Biking, Mountain Biking, Triathlon

Biking, Indoor Biking

Bike lap and lap maximum power (with power sensor)
Race an activity
FTP (Functional Threshold Power) yes (with compatible accessory) yes (with compatible accessory)
Compatible with Vector™ (power meter)
Power meter compatible
Compatible with Varia Vision™ (head-mounted display)
Compatible with Varia™ radar (rear-facing radar)
Compatible with Varia™ lights
Speed and cadence sensor support

yes

yes (ANT™)

yes (ANT™)

Swimming Features

Available swim profiles

Pool Swimming, Open Water Swimming

Pool Swimming, Open Water Swimming, Swimming/Running

Pool Swimming, Open Water Swimming

Open-water swim metrics (distance, pace, stroke count/rate, stroke distance, swim efficiency (SWOLF), calories)
Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories)
Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only)
Drill logging (pool swim only)
Basic rest timer (up from 0) (pool swim only)
"Repeat on" rest timer (pool swim only)
Countdown start (pool swim only)
Pool swim workouts
Heart rate from external HRM (real-time during rests, interval and session stats during rests, and automatic heart rate download post-swim) yes (with HRM-Tri™ and HRM-Swim™) yes (with HRM-Tri™ and HRM-Swim™) yes (with HRM-Tri™ and HRM-Swim™)

Kid Activity Tracking Features

Toe-to-Toe™ Challenges yes (optional Connect IQ app)