Featured image: Garmin
As of November 2026, the fair fight is the Apple Watch Ultra 4 ($799) against the Garmin Fenix 9 Pro (from about $1,100). The Ultra 4 is the better everyday smartwatch if you own an iPhone. The Fenix 9 Pro is the better tool for long days outdoors, serious training and navigation.
Quick answer Buy the Apple Watch Ultra 4 if you use an iPhone and want the best apps, payments, calls and safety features, with battery that now stretches to about two days. Buy a Garmin Fenix 9 Pro (or the cheaper Fenix 9) if you need weeks of battery, proper offline maps, deeper training analysis, or a watch that works with Android. Ultra-runners who care most about battery should also look at the Garmin Enduro 4.
The short verdict: Apple Watch Ultra vs Garmin
Both watches cost a lot and both are built to survive trails, oceans and mountains. They come at it from opposite ends. Apple builds a smartwatch first and adds adventure tools. Garmin builds a training and navigation computer first and adds smartwatch features.
That split explains almost every difference below. The Ultra 4 has the smoother software, the better apps, a built-in 5G/LTE connection and Apple’s satellite messaging. The Fenix 9 Pro has far longer battery life, more detailed maps, more training metrics and more case sizes. It also works with Android phones, while the Ultra only works with an iPhone.
Both lines were refreshed recently. Garmin launched the Fenix 9 and Fenix 9 Pro on August 25, 2026, and Apple announced the Ultra 4 on September 9, 2026. Older models such as the Ultra 3 and Fenix 8 share the same basic trade-offs. For the wider picture beyond the Ultra, see our Garmin vs Apple Watch guide.
Side-by-side specs
The table compares Apple’s only Ultra with Garmin’s flagship Fenix 9 Pro and the standard Fenix 9. Figures come from Apple’s and Garmin’s published specs. Battery numbers are the makers’ claims, and real results vary with settings.
| Spec | Apple Watch Ultra 4 | Garmin Fenix 9 Pro | Garmin Fenix 9 |
|---|---|---|---|
| Case size | 49mm (one size) | 43mm, 47mm or 51mm | 43mm, 47mm or 51mm |
| Case material | Grade 5 titanium | Titanium (first titanium-cased Fenix) | Fiber-reinforced polymer |
| Weight | About 63 g (case) | About 62 g with band (43mm, per TechRadar) | Varies by size |
| Display | Always-on OLED, up to 3,000 nits, sapphire | AMOLED up to 3,000 nits, sapphire; solar-charging versions | AMOLED (twice as bright as Fenix 8), sapphire |
| Battery, smartwatch use | Up to 50 hours (84 hours Low Power) | Up to 31 days (51mm AMOLED); up to 57 days on solar models | Up to 29 days (51mm) |
| Battery, GPS workout | 18 hours; 25 hours Extended; 45 hours Max Extended | Up to 56 hours (51mm); 18 hours (43mm) | Depends on size |
| GPS | Dual-frequency (GPS, Galileo, QZSS, BeiDou) | Multi-band GNSS | Multi-band GNSS |
| Maps | Offline maps; topo for U.S. parks | Built-in routable topo maps, 64 GB storage | Built-in routable topo maps, 64 GB storage |
| Connectivity | 5G/LTE and satellite on every Ultra 4 | LTE and inReach satellite on select models | Bluetooth and Wi-Fi only |
| Water and dive | 100m, EN13319 recreational dive to 40m | 10 ATM, dive-rated | 10 ATM, dive-rated to 40m |
| Phone compatibility | iPhone only | iPhone and Android | iPhone and Android |
| Approx. price (new) | About $799 | About $1,100 to $1,400 | About $1,000 |
Where to buy
Compare the same watch on both sites: eBay for pre-owned and vintage pieces, Amazon for new stock.
Apple Watch Ultra 4
Garmin Fenix 9 Pro
Garmin Fenix 8 Alternative
Apple Watch Series 12 Alternative
Prices and availability change; check the listing before you buy.
Battery life: Garmin still wins by a mile
Battery is the clearest gap. Apple rates the Ultra 4 at up to 50 hours of normal use, which is a real step up from earlier Ultras. TechRadar’s reviewer reported about two and a half days of real-world use with the always-on display and sleep tracking enabled. Fast charging also helps: Apple says 15 minutes adds up to 18 hours of normal use.
A 51mm Fenix 9 Pro is in a different league. Garmin quotes up to 31 days in smartwatch mode on the largest AMOLED model and up to 57 days on solar versions. TechRadar lists up to 56 hours of GPS activity tracking on the 51mm. The smallest 43mm Fenix 9 Pro drops to about 10 days and 18 hours of GPS, so case size matters a lot.
For a single long event, the Ultra 4 is now credible: Apple says Max Extended Workout mode tracks up to 45 hours with GPS readings every second, enough for most 100-mile races. A Garmin can go a week or more of daily training without seeing a charger. An Ultra needs charging every couple of days.
If battery is your top priority, Garmin’s Enduro line goes even further. The Enduro 4, announced in October 2026 at about $899, keeps the 90-day smartwatch battery claim of its predecessor and adds faster maps. Our Garmin Enduro guide covers who it suits.
GPS, maps and navigation
Both watches use multi-band satellite positioning, which helps in cities and canyons where signals bounce. Apple claims the Ultra 4 has the most accurate on-device GPS in a sports watch, based on its own route tests in difficult urban areas. Independent long-term GPS testing is still coming in, so treat that as a maker’s claim for now.
Navigation is where Garmin pulls ahead. Every Fenix 9 ships with built-in routable topographic maps and 64 GB of storage. Garmin says the maps pan up to 30% faster than on the Fenix 8, and a new perspective view shows more of what is coming up ahead. TechRadar’s reviewer used the maps to route around Chamonix and on Scottish trails and found them fast and smooth, with rerouting working once early software issues were fixed.
The Ultra 4 supports offline maps with custom routes, Backtrack and topographic maps for U.S. parks. For day hikes that is plenty; for multi-day routes, the Fenix is the safer pick.
Health and training features
Garmin has long been the deeper training platform. The Fenix 9 adds stamina zones and a stamina curve that show how your endurance changes and how hard you can push on a given day. It also adds indoor rowing metrics, rucking tools that let you change pack weight mid-activity, and Garmin Epic, which groups several days or weeks of activities into one shareable story. All of it sits on top of Garmin’s existing training readiness, recovery time and training load tools, with no subscription.
Apple has narrowed the gap. The Ultra 4 introduces a new Health Sensing System that Apple says delivers the most accurate heart rate sensing in a wearable. It measures heart rate every five seconds and HRV up to 24 times more often. A new daily readiness score from 0 to 10 tells you whether to recover or push. TechRadar’s reviewer found the Ultra 4’s average heart rate on a 5km run was within 2 bpm of a chest strap and 1 bpm of a Fenix 9 Pro.
Apple stays ahead on medical-style features: ECG, irregular rhythm, sleep apnea and hypertension notifications. Garmin remains the stronger coach for training plans and endurance analysis.
Safety: satellite, LTE and SOS
Every Ultra 4 includes 5G/LTE cellular plus satellite communications. Apple says Emergency SOS, Messages and Find My via satellite are included free for two years after activation. Fall Detection, Crash Detection, a siren and Check In round out the safety package. Messages work with the people already in your iPhone contacts.
On the Garmin side, only select Fenix 9 Pro models have LTE and inReach satellite. They support calling, texting and SOS through Garmin’s 24/7 Response center, LiveTrack and location sharing. You need an active inReach plan, which TechRadar lists from about $7.99 a month. Messages run through the Garmin Messenger app, which fewer of your friends will have.
Garmin’s own product lead told TechRadar the Fenix lags Apple here. For a hiker who simply wants SOS and texting from the wrist, the Ultra 4 is the simpler, cheaper setup.
Build, size and display
The Ultra 4 comes in one size: a 49mm Grade 5 titanium case in natural or black. It is rated to 100 meters of water resistance, certified for recreational scuba diving to 40 meters and tested against several MIL-STD 810H conditions. That single size is a real limitation for smaller wrists, a point TechRadar also raised.
Garmin offers three sizes. The Fenix 9 Pro is the first Fenix with a titanium case, and its new construction removes screws and makes the watch about 16% thinner, according to Garmin figures cited by TechRadar. Both Fenix 9 models have sapphire lenses and 3,000-nit-class AMOLED screens. Garmin also keeps physical buttons for every function, which many people prefer with gloves or wet hands.
Both watches include a flashlight. Garmin’s is a dedicated LED torch that now has a green mode to protect night vision. Apple pairs its flashlight with a loud emergency siren. For diving specifically, Garmin’s dedicated dive computers are a step beyond either watch, as covered in our Garmin Descent guide.
Ecosystem: iPhone-only vs everything
This is often the deciding factor. The Ultra 4 requires an iPhone 11 or later with iOS 27. It does not work with Android at all. In return, you get Apple Pay, iMessage, full third-party apps, Siri and tight integration with your phone and the Health app.
Garmin watches pair with iPhone or Android and sync to Garmin Connect, which is free and very detailed. Garmin Pay and Connect IQ apps exist, but the app selection and smart features are thinner than Apple’s. Message replies from the watch are more limited on iPhone than on Android, because Apple restricts what third-party watches can do.
Price and running costs
The Ultra 4 is the cheaper flagship at about $799, unchanged from the Ultra 3, and cellular plus satellite are included. A Fenix 9 starts at about $1,000, and the Fenix 9 Pro runs from about $1,100 to roughly $1,400 for the 51mm inReach version. Add an inReach plan if you want satellite messaging.
The Fenix 8 is often discounted now that the Fenix 9 is out. TechRadar’s view is that Fenix 8 owners have little reason to upgrade, which makes a discounted Fenix 8 one of the best-value ways to get Garmin’s flagship features.
Who wears these watches? Garmin’s flagship is a common sight in trail and mountain running. At Garmin’s Chamonix launch, elite trail runners including Katie Schide and Tom Evans praised the Fenix flashlight, according to TechRadar. For the full list of athletes on each brand, see our best Garmin watch guide.
Which Garmin should you compare against?
“Garmin” covers a lot of watches, and the Ultra 4 does not line up with all of them. Here is how the main options stack up against Apple’s watch.
Garmin Fenix 9 Pro
The closest rival: titanium, bright AMOLED, LTE and satellite options. It costs more than the Ultra 4 but lasts far longer between charges and has better maps. Choose it if you want one watch for training, travel and the backcountry.
Garmin Fenix 9
The same maps, training tools and battery as the Pro, without titanium or LTE and satellite. It is the right Garmin if you carry your phone or a separate satellite messenger anyway.
Garmin Enduro 4
The battery specialist at about $899. It uses a memory-in-pixel screen rather than AMOLED, which is a big part of why it lasts so long. Pick it for ultramarathons and multi-week trips where charging is not an option.
Garmin Instinct 3
The budget rugged option, with a tough polymer case and long battery. It lacks the Fenix’s full maps and premium materials, but it costs a fraction of either flagship. Our Garmin Instinct 3 guide explains which version to buy.
Who should buy which
Buy the Apple Watch Ultra 4 if you own an iPhone, wear your watch all day for work and life, want the best health alerts and safety features without extra fees, and do most of your adventures in a day or a weekend. It is the best all-rounder in this class.
Buy a Garmin Fenix 9 or Fenix 9 Pro if you train seriously, spend multiple days off-grid, need detailed maps, use Android, or simply hate charging. Choose the 51mm size if battery matters, and the Pro only if you want titanium or wrist-based LTE and satellite.
Buy a Garmin Enduro 4 if battery outranks everything else. Buy a discounted Fenix 8 or an Apple Watch Series 12 (about $399) if you want most of the experience for much less money.
FAQ
Is the Apple Watch Ultra better than a Garmin?
It depends on what you value: the Ultra 4 is the better smartwatch, with stronger apps, payments, health alerts and built-in satellite messaging, while a Garmin Fenix 9 or 9 Pro is better for battery life, maps and detailed training, and it works with Android.
Apple Watch Ultra 3 vs Garmin Fenix 8: which should I buy now?
Both are now previous-generation models, so buy whichever you find at the bigger discount from your preferred ecosystem; the Ultra 3 suits iPhone users who want a do-everything smartwatch, while the Fenix 8 suits runners and hikers who want weeks of battery and full topo maps.
Does the Apple Watch Ultra battery last as long as a Garmin?
No, Apple rates the Ultra 4 at up to 50 hours of normal use and 45 hours of GPS in its Max Extended Workout mode, while a 51mm Fenix 9 Pro is rated at up to 31 days as a smartwatch and about 56 hours of GPS tracking.
Can I use an Apple Watch Ultra with an Android phone?
No, the Apple Watch Ultra 4 requires an iPhone 11 or later running iOS 27, so Android users should choose a Garmin or another cross-platform watch.
Do I need a subscription for satellite SOS?
On the Ultra 4, Apple includes Emergency SOS, Messages and Find My via satellite free for two years after activation, while Garmin’s Fenix 9 Pro inReach features need an active inReach plan, which TechRadar lists from about $7.99 a month.
Sources
- Apple Newsroom: Apple unveils Apple Watch Ultra 4
- Apple: Apple Watch Ultra 4 Technical Specifications
- Garmin Newsroom: Garmin expands its flagship performance smartwatch lineup with fenix 9 and fenix 9 Pro
- TechRadar: Apple Watch Ultra 4 review
- TechRadar: Garmin Fenix 9 Pro review
- Tech Advisor: Garmin’s Enduro 4 is defying the global RAM crisis