Apple Watch Ultra 4: Apple’s Most Advanced Adventure Watch Gets Smarter and Lasts Longer
Apple has officially unveiled the Apple Watch Ultra 4, bringing a major collection of health, fitness, battery and artificial intelligence upgrades to its rugged smartwatch.
Designed for athletes, adventurers and anyone who wants a more capable smartwatch, Apple Watch Ultra 4 introduces the new Health Sensing System, Apple's powerful S11 chip, a new Readiness score, improved GPS accuracy, longer battery life and a range of new Apple Intelligence features.
For everyday users, the biggest story isn't simply that Apple Watch Ultra 4 is more powerful. It's that Apple is making the watch increasingly useful for understanding your health, keeping track of your fitness and helping you get through the day.
Apple Watch Ultra 4 is available in natural titanium and black titanium, with Australian pricing starting at A$1,349 including GST. Pre-orders are available now, with the watch arriving in stores on Friday, 18 September.
Apple Watch Ultra 4: What's New?
At the heart of Apple Watch Ultra 4 is a combination of new hardware and software designed to make the watch a more capable health, fitness and everyday companion.
The major upgrades include:
New Health Sensing System
S11 chip
More accurate heart-rate monitoring
More frequent heart-rate variability measurements
New Readiness score
Up to 50 hours of everyday battery life
Up to 84 hours in Low Power Mode
Up to 45 hours of outdoor workout tracking
Faster charging
More accurate step tracking
Improved GPS accuracy
New Audio Intelligence features
Siri AI with Apple Intelligence
New watchOS 27 features
Natural and black titanium finishes
New Trail Loop, Alpine Loop and Ocean Band colours
Together, these upgrades make Apple Watch Ultra 4 much more than a smartwatch aimed exclusively at extreme athletes.
A New Health Sensing System
One of the biggest upgrades in Apple Watch Ultra 4 is the new Health Sensing System.
Apple says the new system provides its most accurate heart-rate sensing in a wearable, using new optical and electrical heart sensors alongside the S11 chip. Apple says its testing involved more than 1,000 participants and compared Apple Watch with leading wearables.
For the average user, this means the Apple Watch can provide more detailed information about what's happening with your body throughout the day.
The optical heart sensor now uses larger, power-efficient green LEDs and measures heart rate every five seconds, providing more continuous health information.
The data also feeds into Apple's Exercise and Move Activity features, while a new heart-rate complication allows users to see their current heart rate directly from the watch face.
More Frequent HRV Measurements
Apple Watch Ultra 4 also takes heart rate variability (HRV) tracking further.
HRV can provide useful information about stress and recovery, and Apple says Ultra 4 measures HRV up to 24 times more often than before.
Apple separates the information into two measurements: Recovery HRV, which is designed to identify daily signals relating to stress and recovery, and overall HRV, which provides broader health insights.
Overnight vitals can now analyse recovery HRV against your personal baseline, while a new daytime vitals view provides another way to monitor changes throughout the day.
For everyday users, this could make the Apple Watch more useful for answering a simple question: How am I actually doing today?
Apple Watch Ultra 4 Introduces Readiness
Another major new feature is Readiness.
Rather than forcing users to interpret a collection of health and fitness statistics themselves, Readiness turns information such as recent activity, training load, vitals and sleep into a single daily score from 0 to 10.
The watch then provides a recommendation such as:
Recover
Pace Yourself
Ready
Go For It
The score can also change during the day as new information becomes available, such as after a hard workout or a change in daytime vitals.
This is one of the features that could have the biggest impact on everyday users.
You don't need to be training for a marathon to benefit from knowing whether your body may need a quieter day or whether you're ready to push yourself.
Longer Apple Watch Ultra 4 Battery Life
Battery life has always been an important consideration with smartwatches, and Apple is giving Ultra 4 a significant boost.
Apple Watch Ultra 4 offers up to 50 hours of normal use, meaning Apple is positioning it as a smartwatch that can comfortably last more than two days between charges.
Switch to Low Power Mode and that figure increases to up to 84 hours.
Charging has also been improved.
Apple says just 15 minutes of charging can provide up to 18 hours of additional battery life.
For anyone who regularly forgets to charge their devices, this could be one of the most practical Apple Watch Ultra 4 upgrades.
Up to 45 Hours of Outdoor Workout Tracking
For serious athletes and adventurers, the battery improvements become even more significant.
The new Extended Workout mode provides up to 25 hours of outdoor workout tracking with full GPS and heart-rate readings.
For longer adventures, Max Extended Workout mode can track outdoor runs, walks and hikes for up to 45 hours, while continuing to take GPS readings every second.
That's potentially enough battery life for extremely long-distance events, including a 160-kilometre race.
For the average consumer, however, the bigger takeaway is simple: you should have far less reason to worry about your Apple Watch running out of battery during a weekend away or an active day outdoors.
More Accurate GPS
Apple is also promising the most accurate on-device GPS in a sports watch.
The company says Apple Watch Ultra 4 was tested against leading dual-frequency GPS sports watches in challenging urban environments.
That should benefit runners, walkers, hikers and cyclists who want more reliable route tracking.
It also means the Ultra 4 isn't just designed for users exploring remote environments. Better location accuracy can be useful during everyday walks, workouts and trips around unfamiliar cities.
Apple Watch Ultra 4 Gets More Accurate at Counting Steps
Apple has redesigned the pedometer model inside Ultra 4 and combined it with new machine-learning algorithms and the S11 chip.
The result, according to Apple, is more accurate distance measurements during indoor walking and running workouts, along with more accurate step counting throughout the day.
There's also a new Steps complication, allowing users to see their current step count directly from their watch face.
It's a relatively simple addition, but it's the sort of feature that could be useful to anyone trying to become more active without needing specialist fitness equipment.
Apple Intelligence Comes to Apple Watch Ultra 4
Artificial intelligence is becoming an increasingly important part of Apple's products, and Apple Watch Ultra 4 is getting its own collection of AI-powered features.
Apple calls the new collection Audio Intelligence.
Using the microphone, S11 chip, Apple Intelligence models on iPhone and Private Cloud Compute, the watch can help users stay aware of important sounds, remember parts of conversations and interact with information around them.
Sound Recognition
Sound Recognition can alert users to important sounds such as:
Sirens
Alarms
Doorbells
A baby crying
Importantly, Apple says this functionality can work even when the user's iPhone isn't nearby.
This could be particularly useful for people who are deaf or hard of hearing.
Live Rewind
Live Rewind is another interesting addition.
A double press of the Digital Crown can display the previous 15 seconds of a conversation as a text snippet, allowing users to catch something they may have missed.
Users can also ask Siri about the content or save it to the Siri app to revisit later.
Siri Recap
Apple Watch Ultra 4 can also use Siri Recap to create high-level summaries of conversations.
Instead of producing a complete transcript, Siri Recap generates a title and key points that can be reviewed later.
That could be particularly useful after meetings, conversations or situations where you need to remember the important details without constantly reaching for your iPhone.
Shazam on Your Wrist
Apple is also making music recognition more convenient.
The updated Shazam functionality can identify music playing around you and display the song title and artist through the Music Recognition widget in the Smart Stack.
It's a small feature, but one that could prove surprisingly handy.
Apple Says Audio Intelligence Is Designed With Privacy in Mind
With AI features that listen to sounds and conversations, privacy is understandably an important consideration.
Apple says Audio Intelligence is designed with privacy at its core.
The company says these features don't create or store audio recordings, while raw audio used for processing is inaccessible to the operating system, apps, the user and Apple.
The S11 chip includes a Secure Exclave, a dedicated hardware-isolated area designed to process audio separately from the rest of the system before immediately deleting it.
Apple also says users control whether individual Audio Intelligence features are enabled.
Live Rewind and Siri Recap are expected to arrive in beta later in 2026.
Siri AI Gets a Major Upgrade
Apple Watch Ultra 4 also gets a new version of Siri through watchOS 27 and Apple Intelligence.
The new Siri is designed to understand personal context and provide access to broader world knowledge directly from the wrist.
A new Siri app allows users to continue conversations while on the go, while a new Siri Modular watch face makes the assistant easier to access.
For the average Apple Watch owner, this could eventually make Siri feel much more useful than simply setting timers, checking the weather or starting workouts.
One important caveat is that Siri AI is rolling out as a beta, initially with English-language support, with additional languages scheduled to follow. Availability also varies by region and device.
watchOS 27 Brings Even More Changes
Apple Watch Ultra 4 ships with watchOS 27, which brings several additional improvements.
The updated software includes a dynamic app grid that can display five Siri-suggested apps based on the apps you use most frequently or recently.
There's also a new single-handed tap gesture that lets you interact with widgets in the Smart Stack using your index finger and thumb.
The Smart Stack itself gets smarter, with contextual widget suggestions appearing when they're relevant — such as a Parked Car suggestion from Maps or a birthday message reminder.
watchOS 27 also adds support for perimenopause and menopause features in Cycle Tracking, as well as improvements to Workout Buddy.
A Rugged Titanium Design
Apple Watch Ultra 4 retains the rugged character that has become synonymous with the Ultra range.
The watch is available in two titanium finishes:
Natural titanium
Black titanium
Apple is also introducing new band colours across its Trail Loop, Alpine Loop and Ocean Band ranges.
The Ocean Band has also been updated with a translucent silicone design and three new colour options: translucent grey, translucent kelp and translucent black.
Apple Watch Hermès Ultra 4
For consumers looking for something a little more luxurious, Apple is also offering an Apple Watch Hermès Ultra 4in natural titanium.
The Hermès version features a new Grand H titanium band with a built-in extension mechanism designed to make it easier to fit over a wetsuit.
It also introduces the Fathom and Wonder watch face, which lets users explore an animated representation of the ocean's depths by rotating the Digital Crown.
Apple Watch Ultra 4 and the Environment
Apple is also highlighting the environmental credentials of its latest Ultra.
The Apple Watch Ultra 4 is made with 45 per cent recycled material overall, including 100 per cent recycled titanium in its 3D-printed titanium case and 100 per cent recycled cobalt in its battery.
Apple says electricity used to manufacture the watch is sourced from renewable energy across its supply chain, while its packaging is fibre-based and designed to be recyclable at home.
Apple Watch Ultra 4 Price and Availability in Australia
For Australian consumers, the Apple Watch Ultra 4 starts at A$1,349 including GST.
Pre-orders are available now, with Apple Watch Ultra 4 arriving in stores from Friday, 18 September 2026.
Apple is also offering eligible new subscribers three months of Apple Fitness+ and Apple Music with the purchase of an Apple Watch Ultra 4, although availability and offer conditions vary by region.
Australian customers can also use Apple's new Afterpay Pay Monthly option in Apple Stores, online and through the Apple Store app, with eligible customers able to choose six- or 12-month payment terms.
Is Apple Watch Ultra 4 Worth It?
The Apple Watch Ultra 4 is clearly aimed at people who want more than a basic smartwatch.
If you're an avid runner, hiker, cyclist, swimmer or outdoor adventurer, the combination of improved GPS, more accurate heart-rate tracking, longer battery life and extended workout modes makes the Ultra 4 an extremely capable fitness companion.
But you don't have to be an elite athlete to benefit from it.
For the average consumer, some of the most interesting features could actually be the everyday ones: 50-hour battery life, faster charging, improved step tracking, Readiness, sleep and health insights, smarter Siri and the new Audio Intelligence features.
Readiness in particular could make the Apple Watch more approachable for people who aren't interested in analysing dozens of individual health metrics.
Instead, you get a simple daily score designed to help answer the question: Should I push myself today, or should I take it a little easier?
The RANT Tech Verdict
The Apple Watch Ultra 4 looks like a substantial evolution of Apple's most capable smartwatch rather than simply another yearly specification bump.
The new Health Sensing System and S11 chip underpin many of the major improvements, while the combination of Readiness, better HRV tracking, longer battery life and more accurate GPS makes the Ultra 4 an even stronger fitness and outdoor companion.
Then there's Apple's growing focus on AI.
With Siri AI, Live Rewind, Siri Recap, Sound Recognition and Shazam, Apple is attempting to make the Apple Watch a more intelligent device that can understand what is happening around you and provide useful information without requiring you to pull out your iPhone.
At A$1,349, it's certainly not a cheap smartwatch. For someone who primarily wants notifications, basic fitness tracking and Apple Pay, a less expensive Apple Watch may make more sense.
But if you want Apple's most rugged smartwatch, advanced health and fitness tracking, longer battery life and the latest Apple Intelligence features, Apple Watch Ultra 4 is shaping up to be a very compelling package.
For adventurers and serious fitness enthusiasts, it's an obvious upgrade. For everyone else, the question is whether you need the Ultra-level hardware — or simply want the best Apple Watch experience available.
Final Thoughts
Apple Watch Ultra 4 is Apple's clearest attempt yet to make its rugged smartwatch an intelligent health and fitness companion that can stay with you for days rather than hours.
With better health sensing, a new Readiness score, longer battery life, improved GPS, more accurate step tracking and Apple's growing collection of AI features, there's a lot here for both serious athletes and everyday users.
The biggest question isn't whether Apple Watch Ultra 4 is capable — it clearly is.
The real question is whether all that capability is worth the premium price for you.
For anyone who spends a lot of time outdoors, trains regularly or simply wants Apple's most advanced smartwatch, the answer could very well be yes.