Apple Watch Ultra 3 vs Garmin Fenix 9 Pro Solar 47mm
Size, specs & wrist fit compared
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Which one fits you
On wrists narrower than about 52mm, the Garmin Fenix 9 Pro Solar 47mm is the safer pick — it stays proportionate down to roughly 49mm, where the Apple Watch Ultra 3 starts to hang over the edge. Above 52mm both sit cleanly, and the Apple Watch Ultra 3 gives you more presence.
The Garmin Fenix 9 Pro Solar 47mm wears larger than the Apple Watch Ultra 3 (47mm vs 44mm case), giving it more wrist presence — and needing a wider wrist to sit cleanly.
The Apple Watch Ultra 3 is the slimmer of the two (12mm vs 15.8mm), so it slides under a cuff more easily.
On the wrist the Apple Watch Ultra 3 feels lighter (61.8g vs 84g, case only).
Among the 326 44mm watches we hold thickness for, the Apple Watch Ultra 3 is thinner than 89%, so it wears flatter than its width suggests.
Among the 102 47mm watches we hold thickness for, the Garmin Fenix 9 Pro Solar 47mm is thicker than 92% — it will sit high even though the case width reads modest.
The Garmin Fenix 9 Pro Solar 47mm is 3mm wider, 2mm shorter, 3.8mm thicker and 22.2g heavier than the Apple Watch Ultra 3.
Apple
Watch Ultra 3
Garmin
Fenix 9 Pro Solar 47mm
Case width
44mm
47mm+3mm
Lug-to-lug
49mm
47mm−2mm
Thickness
12mm
15.8mm+3.8mm
Weight
61.8g
84g+22.2g
Switch or add watches
Apple
Watch Ultra 3
Garmin
Fenix 9 Pro Solar 47mm
Fit tool
Watch Fit Tool
For sports watches, lug-to-lug (L2L) is what matters most — it decides whether a watch overhangs your wrist. Bulky is fine; overhang is not.
Your wrist
mm
≈ 146.9mm aroundDepth
How to Measure Wrist Width
1
Lay your arm flat on a table, palm facing up
2
Measure across the flat top of your wrist (not the circumference)
3
Measure at the point where you wear your watch — typically just below the wrist bone
⚠ Important
Wrist width ≠ circumference. We need the flat width across the top of your wrist where the watch sits, not how far around.
Apple Watch Ultra 3
Case 49.0mm · Lug-to-lug 49.0mm · Thickness 12.0mm · 62g
Sweet Spot
49mm on a 55mm wrist
Understated Balanced Sweet Spot Bold Overhang ⚠
Across the wrist it works — 3.0mm spare each side — but wide enough that the edge of the case back lifts clear of the skin.
On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 49mm.
How to Measure
- 1. Lay your arm flat, palm up.
- 2. Measure the flat width across the top of your wrist — not the circumference.
- 3. Measure where you wear it, just below the wrist bone.
Against one you know
Leather: Attaches at the lugs, so the case back rests on your skin. Thins and softens with wear. The default: depth about seven tenths of the width. Typical figures, not this model’s own.
Show the measurementsHide the measurements
- Across the wrist3.0mm spare each side
Fills the wrist without reaching the edge.
- Off the wrist12.0mm off the skin
Normal sports-watch height for a wrist this size. (12.0mm case, back against the skin)
- How it seats~7.3mm under the rim
Wide enough that the edge of the case back lifts clear of the skin.
- Weight on the wrist62g
Substantial without being a burden — the usual weight of a steel watch on a wrist this size. (1.1g per mm of wrist)
Garmin Fenix 9 Pro Solar 47mm
Case 47.0mm · Lug-to-lug 47.0mm · Thickness 15.8mm · 84g
Sweet Spot
47mm on a 55mm wrist
Understated Balanced Sweet Spot Bold Overhang ⚠
Across the wrist it works — 4.0mm spare each side — but a tall watch on this wrist. Fine over a sleeve, awkward under one.
On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 47mm.
How to Measure
- 1. Lay your arm flat, palm up.
- 2. Measure the flat width across the top of your wrist — not the circumference.
- 3. Measure where you wear it, just below the wrist bone.
Against one you know
Leather: Attaches at the lugs, so the case back rests on your skin. Thins and softens with wear. The default: depth about seven tenths of the width. Typical figures, not this model’s own.
Show the measurementsHide the measurements
- Across the wrist4.0mm spare each side
Fills the wrist without reaching the edge.
- Off the wrist15.8mm off the skin
A tall watch on this wrist. Fine over a sleeve, awkward under one. (15.8mm case, back against the skin)
- How it seats~6.1mm under the rim
Wide enough that the edge of the case back lifts clear of the skin.
- Weight on the wrist84g
Substantial without being a burden — the usual weight of a steel watch on a wrist this size. (1.5g per mm of wrist)
2D Dimension Schematics
Every case drawn to scale on a shared centre — from above, and in profile against the wrist.
Highlight
- Apple Watch Ultra 344mm × 49mm · 12mm thick
- Garmin Fenix 9 Pro Solar 47mm47mm · 15.8mm thick
3D preview
Apple Watch Ultra 3 vs Garmin Fenix 9 Pro Solar 47mm on a wrist
Sized to your own wrist, turned any way you like.
Shapes are built from published measurements, not manufacturer 3D models — accurate proportions, generic dial.
Battery life compared
Furthest apart in Smartwatch mode, where the Garmin Fenix 9 Pro Solar 47mm lasts 12.0× as long as the Apple Watch Ultra 3 (21 days against 42 hours).
Apple Watch Ultra 3Garmin Fenix 9 Pro Solar 47mm
Smartwatch
1.75 days21 daysBattery Saver
72 hours—
Specifications
The short version
7 key specs| Spec | AppleWatch Ultra 3 | GarminFenix 9 Pro Solar 47mm |
|---|---|---|
| Case Width | 44mm | 47mm |
| Lug-to-Lug | 49mm | 47mm |
| Thickness | 12mm | 15.8mm |
| Weight | 61.8g | 84g |
| Shape | Rectangle | Circular |
| Display type | OLED/AMOLED | Sunlight-visible, transflective memory-in-pixel (MIP) |
| Released | 2025 | 2026 |
Every specification
479 specs| Spec | Apple Watch Ultra 3 | Garmin Fenix 9 Pro Solar 47mm |
|---|---|---|
| Design | ||
| width | 44 | — |
| height | 49 | — |
| volume | 25.87 cm³ | — |
| weight | 61.8 g | — |
| thickness | 12 | — |
| ATM rating | 10 ATM | — |
| resolution | 422 x 514 px | — |
| screen size | 1.98 inches | — |
| Display type | OLED/AMOLED | — |
| Has a display | Yes | — |
| pixel density | 326 ppi | — |
| water resistance | Waterproof | — |
| Always-On Display | Yes | — |
| has a touch screen | Yes | — |
| is designed for kids | No | — |
| waterproof depth rating | 100 m | — |
| Watch band is replaceable | Yes | — |
| Has sapphire glass display | Yes | — |
| maximum operating temperature | 55 °C | — |
| Ingress Protection (IP) rating | IPX6 | — |
| has branded damage-resistant glass | No | — |
| lowest potential operating temperature | -20 °C | — |
| Battery | ||
| charge time | 1.5 hours | — |
| battery life | 1.75 days | — |
| has wireless charging | Yes | — |
| has a removable battery | No | — |
| Has a solar power battery | No | — |
| has a rechargeable battery | Yes | — |
| battery life in power save mode | 72 hours | — |
| Sensors | ||
| has GPS | Yes | — |
| has a compass | Yes | — |
| Has a barometer | Yes | — |
| has a gyroscope | Yes | — |
| Has a cadence sensor | No | — |
| has an accelerometer | Yes | — |
| Monitors perspiration | No | — |
| Has a heart rate monitor | Yes | — |
| Has a temperature sensor | Yes | — |
| Monitors blood oxygenation levels | Yes | — |
| Stocks | — | Yes |
| Calendar | — | Yes |
| Passcode | — | Yes |
| Calculator | — | Yes |
| Color shift | — | Yes |
| Connectivity | — | Bluetooth®, ANT+®, Wi-Fi® |
| Garmin Share | — | Yes |
| Find My Phone | — | Yes |
| Sports scores | — | Yes |
| Voice command | — | Yes |
| Evening report | — | Yes |
| Morning report | — | Yes |
| Red shift mode | — | Yes |
| Weather forecasts | — | Yes |
| Smart Notifications | — | Yes |
| Smart trainer control | — | Yes |
| Smartphone compatibility | — | iPhone®, Android™ |
| Controls smartphone music | — | Yes |
| On-device Connect IQ™ Store | — | Yes |
| Plays and controls watch music | — | Yes |
| Find My Phone during GPS activity | — | Yes |
| Pairs with Garmin Connect™ Mobile | — | Yes |
| Compatible with Garmin Messenger app | — | Yes |
| Find My Garmin (helps locate lost device) | — | Yes |
| Battery saver (customizable low power watch) | — | Yes |
| Bluetooth phone calling and voice assistant support | — | Yes |
| Realtime settings sync with Garmin Connect™ mobile | — | Yes |
| View images from notifications on watch (Android™ only) | — | Yes |
| Text response/reject phone call with text (Android™ only) | — | Yes |
| Connect IQ™ (downloadable watch faces, data fields and apps) | — | Yes |
| Features | ||
| RAM | 2GB | — |
| release date | 2025-09-09 | — |
| Has a stopwatch | Yes | — |
| Has smart alarm | No | — |
| warranty period | 1 years | — |
| Has call control | Yes | — |
| Has silent alarm | Yes | — |
| has HRV tracking | Yes | — |
| internal storage | 64GB | — |
| measures VO2 max | Yes | — |
| Has notifications | Yes | — |
| Has ECG technology | Yes | — |
| Locates your phone | Yes | — |
| has a front camera | No | — |
| has fall detection | Yes | — |
| has voice commands | Yes | — |
| Acquires GPS faster | Yes | — |
| Has vibrating alerts | Yes | — |
| number of microphones | 1 | — |
| Can be used to answer calls | Yes | — |
| measures resting heart rate | Yes | — |
| has irregular heart rate warnings | Yes | — |
| has fast/slow heart rate notifications | Yes | — |
| Has a built-in camera remote control function | Yes | — |
| Connectivity | ||
| has NFC | Yes | — |
| SIM cards | 1 eSIM | — |
| Wi-Fi version | Wi-Fi 4 (802.11n) | — |
| supports ANT+ | No | — |
| supports Wi-Fi | Yes | — |
| supports Galileo | Yes | — |
| Bluetooth version | 5.3 | — |
| has a cellular module | Yes | — |
| Is compatible with iOS | Yes | — |
| Is compatible with Android | No | — |
| Miscellaneous | ||
| has aptX | No | — |
| Has passcode | Yes | — |
| Has auto pause | Yes | — |
| has crash detection | Yes | — |
| Is compatible with Windows | No | — |
| Is compatible with Mac OS X | No | — |
| has an external memory slot | No | — |
| Compatible with smart scales | Yes | — |
| has a battery level indicator | Yes | — |
| has a socket for a 3.5 mm audio jack | No | — |
| Compatible with external heart rate monitors | Yes | — |
| App & Software | ||
| Ad-free | Yes | — |
| Free app | Yes | — |
| Has coaching | No | — |
| Includes maps | Yes | — |
| Supports routes | Yes | — |
| Has achievements | Yes | — |
| Has goal setting | Yes | — |
| Has exercise diary | Yes | — |
| Predicts ovulation | Yes | — |
| Can be personalised | Yes | — |
| Has weight tracking | Yes | — |
| Predicts start date | Yes | — |
| Tracks water intake | Yes | — |
| Has inactivity alerts | Yes | — |
| Has period notifications | Yes | — |
| Has temperature tracking | Yes | — |
| Provides activity reports | Yes | — |
| Displays fertile window notifications | Yes | — |
| Counts how many calories you've burned | Yes | — |
| Activity tracking | ||
| Measures pace | Yes | — |
| Tracks distance | Yes | — |
| Tracks elevation | Yes | — |
| Designed for golf | No | — |
| Tracks your sleep | Yes | — |
| Tracks steps taken | Yes | — |
| Designed for diving | Yes | — |
| Has a route tracker | Yes | — |
| Has exercise tagging | Yes | — |
| Has multi-sport mode | Yes | — |
| Tracks calorie intake | No | — |
| Provides sleep reports | Yes | — |
| Detects activities automatically | Yes | — |
| Has a stroke counter for swimming | Yes | — |
| Overview | ||
| Family | — | Garmin |
| General | ||
| Weight | — | 84 g (case only: 63 g) |
| Battery life | — | Smartwatch: Up to 21 days/34 days with solar* Low Power Watch Mode: Up to 37 days/119 days with solar* Activity Mode (Normal): Up to 54 hours/81 hours with solar** Activity Mode + Music (Normal): Up to 15 hours/16 hours with solar** Activity Mode (Max Battery): Up to 132 hours/740 hours with solar** Activity Mode (Extended Battery): Up to 71 hours/127 hours with solar** Activity Mode (Max Accuracy): Up to 38 hours/49 hours with solar** Expedition Mode: Up to 30 days/68 days with solar* See Details *Solar charging, assuming all-day wear with 3 hours per day outside in 50,000 lux conditions **Solar charging, assuming use in 50,000 lux conditions; assuming typical use with SatIQ technology |
| Battery type | — | Lithium ion |
| Display Size | — | 1.3” (33.0 mm) diameter |
| Case material | — | titanium |
| Color display | — | Yes |
| Lens material | — | power sapphire |
| Physical size | — | 47 x 47 x 15.8 mm Fits wrists with the following circumference: Silicone Band: 125-208 mm UltraFit Band: 125-215 mm Leather Band: 132-210 mm ComfortFit Short: 132-202 mm ComfortFit Long: 152-227 mm |
| Bezel material | — | titanium |
| Memory/History | — | 64 GB |
| Strap material | — | silicone |
| Charging method | — | Garmin proprietary plug charger |
| Large font option | — | Yes |
| Display resolution | — | 260 x 260 pixels |
| Built-in speaker/microphone | — | Yes |
| Leakproof inductive buttons | — | Yes |
| QuickFit® watch band compatible | — | included (22 mm) |
| Variant | ||
| Color | — | Titanium with Pebble Gray/Silver Gray Silicone Band |
| Version | — | Pro - Solar |
| Case Size | — | 47 mm |
| Solar Charging | — | Yes |
| inReach Connectivity (LTE/satellite) | — | No |
| Clock Features | ||
| Sleep | — | yes (advanced) |
| Hydration | — | yes (in Garmin Connect™ and optional Connect IQ™ widget) |
| Breathwork | — | Yes |
| Meditation | — | Yes |
| Fitness age | — | Yes |
| Sleep coach | — | Yes |
| Health status | — | Yes |
| Nap detection | — | Yes |
| All-day stress | — | Yes |
| Women's health | — | yes (in Garmin Connect™ and optional Connect IQ™ widget) |
| Health snapshot | — | Yes |
| Jet lag adviser | — | Yes |
| Sleep alignment | — | Yes |
| Respiration rate | — | Yes |
| Skin temperature | — | Yes |
| Lifestyle logging | — | Yes |
| Resting heart rate | — | Yes |
| Breathing variations | — | Yes |
| Past ovulation estimates | — | Yes |
| Abnormal heart rate alerts | — | yes (high and low) |
| Relaxation breathing timer | — | Yes |
| Body Battery™ energy monitor | — | Yes |
| Heart rate (constant, every second) | — | Yes |
| Diving Features | ||
| Indoor rowing max heart rate | — | Yes |
| Indoor rowing FTP (requires compatible rower) | — | Yes |
| Indoor rowing VO2 max (requires compatible rower) | — | Yes |
| Indoor rowing lactate threshold (requires compatible rower) | — | Yes |
| Indoor rowing power curve/zones (requires compatible rower) | — | Yes |
| Gaming Features | ||
| PO2 | — | up to 1.6 with customizable Deco settings |
| Tides | — | Yes |
| Backlight | — | yes (configurable intensity; always on) |
| Gas mixes | — | Air, Nitrox (21-40% Oxygen) |
| APNEA mode | — | Yes |
| Deep Stops | — | yes (using custom Gradient Factors) |
| No fly time | — | Yes |
| Safety Stop | — | yes (customizable off/3min/5min) |
| Dive planner | — | yes (Basic NDL & Gas Planner) |
| Nitrox support | — | Yes |
| Single-gas mode | — | Yes |
| Alerts and alarms | — | yes (vibration only) |
| 3-axis dive compass | — | yes with adjustable heading, quick change to 90R, 90L, and Reciprocal. Indicates degrees and direction back to set heading. |
| Auto start/end dive | — | Yes |
| Decompression model | — | Bühlmann ZHL-16c with Gradient Factors |
| Missed Deco Lockout | — | yes (can be disabled prior to dive with user acknowledgement) |
| Custom end-dive timeout | — | yes (20 sec to 10 min) |
| Customizable conservatism | — | yes (Low/Medium/High) |
| Surface diver status widget | — | yes (Surface Interval, no fly time, N2 loading, CNS, OTU, and Tissue Compartment status) |
| Automatic altitude adjustment | — | Yes |
| Dive ascent/descent rate indicator | — | Yes |
| Dive activity maximum operating depth | — | 40 meters |
| Sync dive log to Garmin Dive™ Mobile app | — | Yes |
| Automatically saves dive entry and exit locations | — | Yes |
| Rowing Features | ||
| Wearable trolling motor remote | — | Yes |
| Boating Features | ||
| TrueUp™ | — | Yes |
| Move IQ™ | — | Yes |
| Step counter | — | Yes |
| Floors climbed | — | Yes |
| Calories burned | — | Yes |
| Distance traveled | — | Yes |
| Intensity minutes | — | Yes |
| Automatic rep counting | — | Yes |
| Garmin Connect™ Challenges app | — | yes (optional Connect IQ app) |
| Move alerts (displays on device after a period of inactivity) | — | Yes |
| Auto goal (learns your activity level and assigns a daily step goal) | — | Yes |
| Cycling Features | ||
| Pool swim workouts | — | Yes |
| Critical swim speed | — | Yes |
| Time and distance alerts | — | Yes |
| Auto rest (pool swim only) | — | Yes |
| Drill logging (pool swim only) | — | Yes |
| Pacing alerts (pool swim only) | — | Yes |
| Countdown start (pool swim only) | — | Yes |
| Underwater wrist-based heart rate | — | Yes |
| "Repeat on" rest timer (pool swim only) | — | Yes |
| Basic rest timer (up from 0) (pool swim only) | — | Yes |
| Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only) | — | Yes |
| Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories) | — | Yes |
| Open-water swim metrics (distance, pace, stroke count/rate, stroke distance, swim efficiency (SWOLF), calories) | — | Yes |
| Heart rate from external HRM (real-time during rests, interval and session stats during rests, and automatic heart rate download post-swim) | — | yes (with compatible HRM) |
| Golfing Features | ||
| Tides | — | Yes |
| Auto rest | — | Yes |
| Sight 'N Go | — | Yes |
| Tide glance | — | Yes |
| Fish forecast | — | Yes |
| UltraTrac mode | — | Yes |
| Vertical speed | — | Yes |
| GPS coordinates | — | Yes |
| Elevation profile | — | Yes |
| Projected waypoint | — | Yes |
| Total ascent/descent | — | Yes |
| Future elevation plot | — | Yes |
| Distance to destination | — | Yes |
| Expedition GPS Activity | — | Yes |
| Sun and moon information | — | Yes |
| Rest Timer (Ultra Run only) | — | Yes |
| Barometric trend indicator with storm alert | — | Yes |
| Running Features | ||
| PinPointer | — | Yes |
| Swing Tempo | — | Yes |
| Custom targets | — | Yes |
| Tempo Training | — | Yes |
| Virtual caddie | — | Yes |
| Full vector map | — | Yes |
| Handicap scoring | — | Yes |
| Tournament legal | — | Yes |
| Digital scorecard | — | Yes |
| Garmin AutoShot™ | — | Yes |
| PlaysLike distance | — | Yes |
| Round timer/odometer | — | Yes |
| Auto CourseView updates | — | Yes |
| Yardage to layups/doglegs | — | Yes |
| Hazards and course targets | — | Yes |
| Pairs with Garmin Golf app | — | Yes |
| Green View with manual pin position | — | Yes |
| Preloaded with 43,000 courses worldwide | — | Yes |
| Green Contours (with Garmin Golf membership) | — | Yes |
| CT1 Automatic club tracking compatible (requires accessory) | — | Yes |
| CT10 Automatic club tracking compatible (requires accessory) | — | Yes |
| Yardage to F/M/B (distance to front, middle and back of green) | — | Yes |
| Stat tracking (strokes, putts per round, greens and fairways hit) | — | Yes |
| Wind speed and direction (requires connection to Garmin Golf app) | — | Yes |
| Touch-targeting (touch target on display to see the distance to any point) | — | Yes |
| Measures shot distance (calculates exact yardage for shots from anywhere on course) | — | automatic |
| What You'll Love | ||
| Timer | — | Yes |
| Stopwatch | — | Yes |
| Time/date | — | Yes |
| Alarm clock | — | Yes |
| Touchscreen | — | Yes |
| Display type | — | Sunlight-visible, transflective memory-in-pixel (MIP) |
| Water rating | — | 10 ATM |
| GPS Time Sync | — | Yes |
| Garmin Pay™ | — | Yes |
| Music storage | — | Yes |
| Garmin ECG App | — | Yes |
| LED flashlight | — | Yes |
| Multi-band GPS | — | Yes |
| Solar Charging | — | Yes |
| Training status | — | Yes |
| Built-in mapping | — | Yes |
| Smart wake alarm | — | Yes |
| Training readiness | — | Yes |
| Sunrise/sunset times | — | Yes |
| Pulse Ox blood oxygen | — | Yes |
| Sleep score and insights | — | Yes |
| Automatic daylight saving time | — | Yes |
| Battery life (smartwatch mode) | — | Up to 21 days (34 days with solar*) |
| Make calls and send texts via voice | — | Yes |
| Activity Profiles | ||
| Assistance | — | Yes |
| Live Event Sharing | — | Yes |
| Incident Detection during select activities | — | Yes |
| Incident detection alert on phone for wearables | — | Yes |
| Tactical Features | ||
| Gaming Activity | — | Yes |
| GameOn™ app compatible | — | Yes |
| Outdoor Recreation | ||
| Up Ahead | — | Yes |
| TracBack® | — | Yes |
| Back to start | — | Yes |
| Explore Nearby | — | Yes |
| Perspective view | — | Yes |
| NextFork™ navigation | — | Yes |
| Point-to-point navigation | — | Yes |
| Preloaded ski resort maps | — | Yes |
| ClimbPro™ Ascent Planner | — | Yes |
| Preloaded road and trail maps | — | Yes |
| Bread crumb trail in real time | — | Yes |
| Downloadable cartography support | — | Yes |
| Daily Smart Features | ||
| HIIT workouts | — | Yes |
| Yoga workouts | — | Yes |
| Cardio workouts | — | Yes |
| Pilates workouts | — | Yes |
| Rucking workouts | — | Yes |
| Strength workouts | — | Yes |
| Multisport workouts | — | Yes |
| Garmin Cycling Coach | — | Yes |
| Garmin Running Coach | — | Yes |
| Garmin Triathlon Coach | — | Yes |
| Garmin Coach - Strength | — | Yes |
| Mixed session multisport | — | Yes |
| Garmin Running Coach Experts | — | Yes |
| On-screen workout animations | — | Yes |
| On-screen workout muscle maps | — | Yes |
| Garmin Coach - Prebuilt Cycling Plans | — | Yes |
| Grade-adjusted pace based workouts (running) | — | Yes |
| Daily Suggested Workout - Cycling (Pace and Heart Rate Based) | — | Yes |
| Daily Suggested Workout - Running (Pace and Heart Rate Based) | — | Yes |
| Mapping & Navigation | ||
| Courses | — | Yes |
| Power guide | — | Yes |
| MTB Grit & Flow | — | Yes |
| Race an activity | — | Yes |
| Power meter compatible | — | Yes |
| Advanced cycling dynamics | — | Yes |
| Power curve and % FTP workouts | — | Yes |
| Compatible with Varia™ lights | — | Yes |
| FTP (Functional Threshold Power) | — | yes (with compatible accessory) |
| Compatible with Varia headlight camera | — | Yes |
| Speed and cadence sensor support (w/sensor) | — | Yes |
| Cycle Map (routable cycling-specific street map) | — | Yes |
| Bike lap and lap maximum power (with power sensor) | — | Yes |
| Compatible with Varia™ radar (rear-facing radar) | — | Yes |
| Compatible with Vector™ and Rally™ (power meters) | — | Yes |
| Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories) | — | Yes |
| Activity Tracking Features | ||
| % HRR | — | Yes |
| % HR max | — | Yes |
| HR zones | — | Yes |
| HR alerts | — | Yes |
| Shortcuts | — | Yes |
| HRV status | — | Yes |
| Load ratio | — | Yes |
| Manual lap | — | Yes |
| Rest timer | — | Yes |
| Auto max HR | — | Yes |
| Auto scroll | — | Yes |
| Finish time | — | Yes |
| Garmin Epic | — | Yes |
| HR calories | — | Yes |
| Voice alerts | — | Yes |
| Custom alerts | — | Yes |
| Physio TrueUp | — | Yes |
| Recovery time | — | Yes |
| Training load | — | Yes |
| VO2 Max (Run) | — | Yes |
| Course guidance | — | Yes |
| Endurance score | — | Yes |
| Training effect | — | Yes |
| Virtual Partner | — | Yes |
| Workout benefit | — | Yes |
| Race an Activity | — | Yes |
| Realtime stamina | — | Yes |
| Advanced workouts | — | Yes |
| Interval training | — | Yes |
| Race glance/widget | — | Yes |
| Training load focus | — | Yes |
| VO2 Max (Trail Run) | — | Yes |
| Garmin Live Segments | — | Yes |
| Strava Live Segments | — | Yes |
| GPS speed and distance | — | Yes |
| Configurable lap alerts | — | Yes |
| Customizable data pages | — | Yes |
| Unified training status | — | Yes |
| Touch and/or button lock | — | Yes |
| Activity history on watch | — | Yes |
| Multisport auto transition | — | Yes |
| Downloadable training plans | — | Yes |
| Training effect (anaerobic) | — | Yes |
| Manual multisport activities | — | Yes |
| HRM running pace and distance | — | Yes |
| Heat and altitude acclimation | — | Yes |
| Customizable activity profiles | — | Yes |
| Trendline™ Popularity Routing | — | Yes |
| Auto Pause® automatic timer halt | — | Yes |
| Respiration rate (during exercise) | — | yes (with compatible accessory) |
| Auto Lap® interval tracking feature | — | Yes |
| Primary benefit (Training Effect labels) | — | Yes |
| Round-trip course creator (running/cycling) | — | Yes |
| Power Modes - customizable in-activity battery settings | — | Yes |
| HR broadcast (broadcasts HR data over ANT+® to paired devices) | — | Yes |
| Improved interval (includes open repeats, intervals data page, rest screen and auto detection) | — | Yes |
| 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) |
| Workout and Training Plans | ||
| Gym | — | Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, Jump Roping |
| Dive | — | Scuba Diving (single gas), Apnea Diving |
| Swim | — | Pool Swimming, Open Water Swimming |
| Cycling | — | Biking, Road Biking, Mountain Biking, Gravel Biking, Bike Commuting, Bike Touring, eBiking, eMountain Biking, Indoor Biking, Cyclocross, BMX |
| Wellness | — | Walking, Pilates, Yoga, Indoor Walking, Mobility |
| Multisport | — | Swimming/Running, Triathlon |
| In the ring | — | Boxing, Mixed Martial Arts |
| Team sports | — | Basketball, Volleyball, Field Hockey, Ice Hockey, Football/Soccer, American Football, Lacrosse, Rugby, Ultimate Disc, Cricket, Softball, Baseball |
| Motor sports | — | Motorcycling, Overlanding, Motocrossing, ATVing, Snowmobiling |
| On the water | — | Stand Up Paddleboarding, Rowing, Kayaking, Surfing, Kiteboarding, Windsurfing, Fishing, Boating, Sailing, Water Skiing, Wakeboarding, Wakesurfing, Tubing, Snorkeling, Whitewater |
| Racket sports | — | Tennis, Pickleball, Badminton, Squash, Table Tennis, Padel, Platform Tennis, Racquetball |
| Indoor running | — | Treadmill Running, Indoor Track Running, Virtual Running |
| Outdoor running | — | Running, Outdoor Track Running, Trail Running, Ultra Running, Obstacle Racing |
| Snow and winter | — | Skiing, Snowboarding, Backcountry Snowboarding, XC Classic Skiing, XC Skate Skiing, Backcountry Skiing, Ice Skating, Snowshoeing |
| Outdoor recreation | — | Hiking, Rucking, Indoor Climbing, Bouldering, Mountaineering, Hunting, Horseback Riding, Golfing, Disc Golf, ArcheryX |
| Other activity profiles | — | Inline Skating |
| Health & Wellness Monitoring | ||
| GPS | — | Yes |
| QZSS | — | Yes |
| BeiDou | — | Yes |
| Compass | — | Yes |
| GLONASS | — | Yes |
| Galileo | — | Yes |
| Gyroscope | — | Yes |
| Thermometer | — | Yes |
| Depth sensor | — | yes (to 40 m) |
| Accelerometer | — | Yes |
| SatIQ™ Technology | — | Yes |
| Ambient light sensor | — | Yes |
| Barometric altimeter | — | Yes |
| Pulse Ox Blood Oxygen Saturation Monitor | — | Yes |
| Garmin Elevate™ wrist heart rate monitor | — | Yes |
| Safety and Tracking Features | ||
| Dual grid coordinates | — | Yes |
| Training, Planning and Analysis Features | ||
| Hill score | — | Yes |
| Run workouts | — | Yes |
| Running power | — | Yes |
| Race predictor | — | Yes |
| Running Economy | — | yes (with compatible accessory) |
| Step speed loss | — | yes (with compatible accessory) |
| Foot pod capable | — | Yes |
| Running dynamics | — | Yes |
| Lactate threshold | — | Yes |
| Running Tolerance | — | Yes |
| Grade-adjusted pace | — | Yes |
| Trail run auto climb | — | Yes |
| Performance condition | — | Yes |
| Run/Walk/Stand detection | — | Yes |
| Stride length (real time) | — | Yes |
| PacePro™ Pacing Strategies | — | Yes |
| Projected race time and pace | — | Yes |
| Vertical oscillation and ratio | — | Yes |
| Ground contact time and balance | — | yes (GCT balance with accessory) |
| GPS-based distance, time and pace | — | Yes |
| Course- and weather-specific race predictor | — | Yes |
| Cadence (provides real-time number of steps per minute) | — | Yes |
Wrist Fit
Apple Watch Ultra 3
Sits best on wrists ~52–70mm wide (≈ 13.9–18.7cm circumference).
Garmin Fenix 9 Pro Solar 47mm
Sits best on wrists ~49–67mm wide (≈ 13.1–17.9cm circumference).
Frequently Asked Questions
Is the Apple Watch Ultra 3 bigger than the Garmin Fenix 9 Pro Solar 47mm?
The Garmin Fenix 9 Pro Solar 47mm is bigger — 47mm vs 44mm case width.
Which fits a smaller wrist better, the Apple Watch Ultra 3 or the Garmin Fenix 9 Pro Solar 47mm?
The Apple Watch Ultra 3 suits wrists around 52–70mm wide, and the Garmin Fenix 9 Pro Solar 47mm around 49–67mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Apple Watch Ultra 3 and Garmin Fenix 9 Pro Solar 47mm side by side at true scale?
Yes — the schematics and photos above show both watches at matched scale, and our fit tool overlays each on your wrist width.
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