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Apple’s September 9, 2024 announcement is now historical: the four features it previewed for the Apple Watch Series 9 and Apple Watch Ultra 2 shipped through watchOS 11 and related updates. Sleep apnea notifications and the Tides app are available on both watches. The improved Action button and built-in-speaker media playback are Ultra 2 features, because the Series 9 does not have an Action button and was not included in Apple’s speaker-playback announcement.
The most important addition is sleep apnea notifications, but it is also the feature that needs the most careful explanation: it can identify patterns associated with possible moderate to severe sleep apnea, not diagnose the condition.
At a glance: which watch gets which feature?
| Feature | Apple Watch Series 9 | Apple Watch Ultra 2 | Important limitation |
|---|---|---|---|
| Sleep apnea notifications | Yes | Yes | Requires supported software, sleep data and an eligible user; it is not a diagnosis. |
| Action button improvements | No Action button | Yes | Ultra-specific hardware and watchOS behavior. |
| Tides app | Yes | Yes | Coverage and availability can vary by location; it is not an emergency marine-navigation tool. |
| Media playback through built-in speakers | Not the announced feature | Yes | Designed for convenient listening, not as a replacement for headphones or a high-fidelity speaker. |
Apple released watchOS 11 on September 16, 2024. Therefore, a current owner should think of these as released capabilities rather than features that are still “coming soon.” Compatibility can also depend on having the latest compatible version of watchOS and iOS.
1. Sleep apnea notifications
Sleep apnea notifications are the most consequential of the four additions. On supported Apple Watch models, the accelerometer monitors wrist movements during sleep. Apple uses those movements to estimate a metric called Breathing Disturbances. Repeated disturbances over multiple nights may form a pattern associated with moderate to severe obstructive sleep apnea.
If the pattern is sufficiently consistent, the wearer may receive a notification suggesting that they discuss the findings with a healthcare professional. Apple also provides a report that can be exported and shared during that discussion.
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What the feature does—and does not—mean
The FDA’s 510(k) record for Apple’s Sleep Apnea Notification Feature lists a decision date of September 13, 2024. The FDA describes it as an over-the-counter, software-only mobile medical application that analyzes Apple Watch sensor data for patterns suggestive of moderate to severe sleep apnea.
That clearance does not mean the Apple Watch diagnoses sleep apnea. The feature is not intended to diagnose, treat or help manage the condition. A notification is a reason to seek professional evaluation, not a medical conclusion. Conversely, failing to receive a notification does not establish that a person does not have sleep apnea. Anyone with symptoms or concerns should speak with a qualified healthcare professional regardless of what the watch reports.
Requirements and eligibility
Apple’s support requirements include:
- An Apple Watch Series 9 or later, Apple Watch Ultra 2, or another supported newer model.
- The latest compatible versions of watchOS and iOS.
- Sleep tracking configured on the watch.
- At least 10 nights of sleep data within a 30-day period.
- The user must be at least 18 years old.
- The user must not have a previous diagnosis of sleep apnea.
The feature is therefore not an instant overnight test. The watch needs enough sleep data to look for a recurring pattern, and the result remains a screening-style notification rather than a clinical diagnosis.
How to get useful results
- Wear the watch to sleep consistently rather than expecting a result from one night.
- Make sure sleep tracking is configured and the watch has enough charge for overnight monitoring.
- Keep the iPhone and Apple Watch updated to compatible software.
- If Apple produces a notification, export the report and take it to a healthcare professional.
- Do not use a quiet result as a reason to ignore symptoms such as loud snoring, witnessed breathing pauses, gasping during sleep or excessive daytime sleepiness.
2. The Ultra 2’s more flexible Action button
The Action button improvement applies to the Apple Watch Ultra 2. The Series 9 has a Digital Crown and side button, but it does not have the customizable Ultra-style Action button.
Before watchOS 11, the Ultra 2’s Action button was assigned to a selected function. With the update, pressing and holding the button can let users switch among assigned actions. Apple lists options such as:
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- Starting a workout.
- Switching workout types during a Multisport workout.
- Opening Stopwatch.
- Starting Backtrack.
- Turning on Flashlight.
- Opening Translation.
- Starting Voice Memos.
- Launching Shazam.
The practical change is speed. An outdoor user or athlete can reach several frequently used functions from a physical control instead of opening Settings or navigating through apps. It is especially useful when gloves, rain or movement make touchscreen navigation inconvenient.
Not every option is exclusive to the Ultra 2. The update changes the way the physical Action button can be configured and switched; it does not make every listed app or function an Ultra-only capability.
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The Tides app is the clearest shared feature in the announcement. It is available on both the Apple Watch Series 9 and Apple Watch Ultra 2 and provides a rolling seven-day view of forecasted tidal information.
Depending on the selected coastline or surf spot, the app can show:
- High and low tides.
- Whether the tide is rising or falling.
- Tide height and direction.
- Sunrise and sunset on a timeline.
- Nearby beaches on a map.
- Favorite locations and nearby beaches as complications.
Apple’s later support information describes coverage of more than 115,000 beaches and 5,000 surf spots worldwide. That is a substantial database, but it does not guarantee identical coverage in every country or for every shoreline. Check whether the location you actually use appears in the app before relying on it for planning.
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Who benefits most?
The Tides app is useful for surfers, kayakers, sailors, anglers, swimmers, divers and anyone planning a coastal trip. A complication can provide a quick glance at a saved beach, while the timeline gives more context than a single high- or low-tide time.
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4. Media playback through the Ultra 2’s built-in speakers
Apple also enabled the Apple Watch Ultra 2 to play media through its built-in speakers. Apple’s examples include Apple Music, Apple Podcasts and Apple Books, along with supported third-party apps.
Before this change, the speakers were mainly used for alerts, calls and system sounds. General media playback makes the Ultra 2 more convenient for short listening sessions when headphones are impractical—for example, checking spoken audio while working outdoors or listening briefly during a routine task.
This is a convenience feature, not a claim that the Ultra 2 replaces headphones. The watch’s dual speakers are not intended to deliver a private listening experience in a noisy environment or function as a high-fidelity standalone speaker system. For longer listening, crowded surroundings or privacy, headphones remain the better option.
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What this means for Series 9 owners
The Series 9 received two of the four feature areas: sleep apnea notifications and the Tides app. Those are also the additions with the broadest usefulness. A Series 9 owner who sleeps in the watch can use the sleep-related feature if they meet Apple’s requirements, while a coastal user can use Tides without owning the Ultra model.
The Series 9 did not gain an Action button because it lacks the required physical control. It also was not the model identified in Apple’s announcement for built-in-speaker media playback.
In other words, watchOS 11 did not turn the Series 9 into an Ultra 2. It added meaningful software capabilities to both watches while leaving some Ultra-specific benefits tied to the Ultra 2’s hardware.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What this means for Ultra 2 owners
The Ultra 2 receives all four feature areas described in the announcement:
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- Sleep apnea notifications, subject to the same requirements and medical limitations.
- The Tides app for seven-day tidal planning.
- A more flexible Action button workflow.
- Media playback through its built-in speakers.
That combination reinforces the Ultra 2’s focus on outdoor activity and quick access to tools. However, none of these updates alone changes the watch’s underlying hardware generation. The Ultra 2 was introduced in 2023; Apple’s September 2024 hardware news included a black titanium refresh while the software additions arrived through watchOS 11.
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Should you buy or upgrade for these features?
These features are not equally strong reasons to change watches.
- Sleep apnea notifications: potentially valuable for an eligible adult who already wears the watch overnight, but not a substitute for medical testing or professional care.
- Tides: a useful shared feature if you regularly visit coastlines and your locations are covered.
- Action button improvements: a meaningful convenience upgrade for Ultra 2 owners who frequently switch between workouts and outdoor tools.
- Speaker playback: useful for short spoken-audio sessions, but unlikely to justify an upgrade by itself.
If you already own a Series 9, watchOS 11 delivers the two features most likely to matter across a broad range of users. If you are comparing the Series 9 with the Ultra 2, the decision should primarily reflect the Ultra 2’s hardware advantages—including the Action button, dual speakers, larger outdoor-oriented design and other model-specific capabilities—not the assumption that all four features are available on both watches.
Frequently Asked Questions
Did the Apple Watch Series 9 get all four features?
No. Series 9 received sleep apnea notifications and the Tides app. The Action button improvements apply to Apple Watch Ultra 2, which has the required button, and Apple’s announcement specifically identified Ultra 2 for built-in-speaker media playback.
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No. The feature can identify patterns associated with possible moderate to severe sleep apnea and notify the wearer. It is not intended to diagnose, treat or manage sleep apnea. A notification should be discussed with a healthcare professional, and no notification does not prove that sleep apnea is absent.
How much sleep data does Apple Watch need for sleep apnea notifications?
Apple says the feature requires at least 10 nights of sleep data within a 30-day period, along with a supported watch, compatible software and configured sleep tracking.
Can the Tides app be used for navigation or emergency safety?
It is a tidal-information and planning tool, not a replacement for nautical charts, local marine forecasts, weather warnings, navigation equipment or professional safety judgment.
Can Apple Watch Ultra 2 play music without headphones?
Apple announced media playback through the Ultra 2’s built-in speakers for services and apps such as Apple Music, Apple Podcasts and Apple Books. It is best suited to short, convenient listening and is not a replacement for headphones in noisy or private settings.
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The Bottom Line
The short version: watchOS 11 delivered two shared additions—sleep apnea notifications and Tides—and two Ultra 2-specific improvements—the flexible Action button and built-in-speaker media playback. Series 9 owners get the health-related screening feature and coastal information tool, while Ultra 2 owners also benefit from hardware-dependent controls and audio playback. The sleep feature can point to a possible problem, but it cannot diagnose one.
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