Apple Watch Series 11 and Apple Watch Ultra 3 launched on September 9, 2025 with two prominent health additions: hypertension notifications and a sleep score. Neither watch takes a conventional on-demand blood-pressure reading, and neither feature is exclusive to the new models. Hypertension notifications also work on Series 9 or later and Ultra 2 or later, while sleep score arrives through watchOS 26 on a wider range of watches.
The two headline health features
Hypertension notifications
Apple Watch uses its optical heart sensor to look for patterns associated with possible chronic high blood pressure. It evaluates data across repeated 30-day periods and can notify an eligible wearer when the pattern meets Apple’s criteria. It does not display systolic or diastolic numbers, take a cuff-style reading, diagnose hypertension, or replace clinical care. Apple describes the function as a notification about possible hypertension, not a diagnosis. See Apple’s requirements and explanation at Apple Support.
Sleep score
watchOS 26 adds a single sleep-quality score based on total sleep duration, bedtime consistency, awakenings, and time spent in sleep stages. The score appears in the Sleep app on the watch and can be reviewed over time in the Health app on iPhone, including through a watch-face complication or Smart Stack. Apple says its method was informed by the American Academy of Sleep Medicine, National Sleep Foundation, and World Sleep Society and developed using more than five million nights from the Apple Heart and Movement Study. It is a trend tool, not a diagnosis of insomnia, sleep apnea, or another disorder.
Does Apple Watch Series 11 measure blood pressure?
Not in the usual numerical sense. You cannot open an app and obtain a current reading such as 128/ otra 82 mmHg. Instead, the watch analyzes optical-sensor data over time and may flag a pattern associated with chronic high blood pressure. A notification should prompt follow-up measurements with a validated upper-arm monitor and discussion with a health professional.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
#1 Best Overall
![Apple Watch Series 11 [GPS 46mm] Smartwatch with Jet Black Aluminum Case with Black Sport Band - M/L. Sleep Score, Fitness Tracker, Health Monitoring, Always-On Display, Water Resistant](https://m.media-amazon.com/images/I/416RQ0rtsUL._SL160_.jpg)
- A FULL-FEATURED HEALTH TRACKER—Apple Watch Series 11 gives you invaluable insights about your body, right from your wrist. Take an ECG anytime* and get alerts for a high and low heart rate or an irregular rhythm*—so you can stay closer to your heart. You can also view your overnight health tracking metrics with the Vitals app* and be notified of possible sleep apnea.*
- KNOW YOUR SLEEP SCORE—With advanced sleep tracking, Series 11 gives you a daily sleep score. It’s an easy way to help measure and understand the quality of your sleep, so you can make it more restorative.
- GET HYPERTENSION NOTIFICATIONS—Did you know that Series 11 can spot signs of chronic high blood pressure? By analyzing how your blood vessels respond to beats of the heart, it can notify you of possible hypertension.*
- SAFETY FEATURES—A smartwatch that puts your safety first. Series 11 can detect a hard fall or severe car crash, automatically help connect you with emergency services, and notify your emergency contacts.* Check In can automatically notify a loved one when you’ve arrived at your destination.
- A POWERFUL FITNESS TRACKER—With advanced metrics and motivating features like Pacer, Heart Rate Zones, training load, and Workout Buddy powered by Apple Intelligence from your nearby iPhone*—Series 11 is made to help everyone stay active, from runners and hikers to strength-training enthusiasts.
No notification does not prove that your blood pressure is normal; Apple’s feature is not designed to identify every case. If you have symptoms, risk factors, or abnormal cuff readings, do not wait for a watch alert. Seek urgent care for severe symptoms or dangerously high readings.
Which Apple Watches receive these features?
| Function | Series 11 | Ultra 3 | Earlier compatible models |
|---|---|---|---|
| Hypertension notifications | Yes | Yes | Series 9 or later; Ultra 2 or later (SE excluded) |
| Sleep score | Yes | Yes | Series 6 or later, SE 2 or later, and all Ultra models with watchOS 26 |
| ECG | Yes | Yes | Model, country and software dependent |
| Sleep-apnea notifications | Yes | Yes | Model, country and software dependent |
| Vitals app and wrist-temperature sensing | Yes | Yes | Model dependent |
| Blood Oxygen | Market/model dependent | Market/model dependent | Region and model dependent |
Apple’s watchOS 26 compatibility and restrictions are listed at Apple Support. Health features can vary by country, language, regulatory status and software version.
Rank #2
![Apple Watch Series 11 [GPS 42mm] Smartwatch with Rose Gold Aluminum Case with Light Blush Sport Band - S/M. Sleep Score, Fitness Tracker, Health Monitoring, Always-On Display, Water Resistant](https://m.media-amazon.com/images/I/31caPPnRysL._SL160_.jpg)
- A FULL-FEATURED HEALTH TRACKER—Apple Watch Series 11 gives you invaluable insights about your body, right from your wrist. Take an ECG anytime* and get alerts for a high and low heart rate or an irregular rhythm*—so you can stay closer to your heart. You can also view your overnight health tracking metrics with the Vitals app* and be notified of possible sleep apnea.*
- KNOW YOUR SLEEP SCORE—With advanced sleep tracking, Series 11 gives you a daily sleep score. It’s an easy way to help measure and understand the quality of your sleep, so you can make it more restorative.
- GET HYPERTENSION NOTIFICATIONS—Did you know that Series 11 can spot signs of chronic high blood pressure? By analyzing how your blood vessels respond to beats of the heart, it can notify you of possible hypertension.*
- SAFETY FEATURES—A smartwatch that puts your safety first. Series 11 can detect a hard fall or severe car crash, automatically help connect you with emergency services, and notify your emergency contacts.* Check In can automatically notify a loved one when you’ve arrived at your destination.
- A POWERFUL FITNESS TRACKER—With advanced metrics and motivating features like Pacer, Heart Rate Zones, training load, and Workout Buddy powered by Apple Intelligence from your nearby iPhone*—Series 11 is made to help everyone stay active, from runners and hikers to strength-training enthusiasts.
Requirements for hypertension notifications
- Apple Watch Series 9 or later, or Apple Watch Ultra 2 or later.
- The latest available watchOS and an iPhone 11 or later running the latest available iOS.
- Wrist Detection enabled and consistent usable heart-sensor data.
- Generally age 22 or older, with no previous hypertension diagnosis recorded for the intended use.
- No active pregnancy recorded in the Health app.
- Availability of the feature in your country or region.
Turn it on in Health
- Open the Health app on your iPhone.
- Open Summary, then tap your profile picture or account icon.
- Choose Health Checklist.
- Select Hypertension Notifications and follow the eligibility and calibration instructions shown on screen.
Apple can change menu labels between iOS releases, so use the labels displayed on your current iPhone.
Series 11 versus Ultra 3 for health tracking
The underlying health platform is broadly similar. Ultra 3’s premium is mainly for endurance, ruggedness and connectivity rather than exclusive health sensors.
Rank #3
![Apple Watch Series 11 [GPS 42mm] Smartwatch with Jet Black Aluminum Case with Black Sport Band - S/M. Sleep Score, Fitness Tracker, Health Monitoring, Always-On Display, Water Resistant](https://m.media-amazon.com/images/I/41s72HIk5TL._SL160_.jpg)
- A FULL-FEATURED HEALTH TRACKER—Apple Watch Series 11 gives you invaluable insights about your body, right from your wrist. Take an ECG anytime* and get alerts for a high and low heart rate or an irregular rhythm*—so you can stay closer to your heart. You can also view your overnight health tracking metrics with the Vitals app* and be notified of possible sleep apnea.*
- KNOW YOUR SLEEP SCORE—With advanced sleep tracking, Series 11 gives you a daily sleep score. It’s an easy way to help measure and understand the quality of your sleep, so you can make it more restorative.
- GET HYPERTENSION NOTIFICATIONS—Did you know that Series 11 can spot signs of chronic high blood pressure? By analyzing how your blood vessels respond to beats of the heart, it can notify you of possible hypertension.*
- SAFETY FEATURES—A smartwatch that puts your safety first. Series 11 can detect a hard fall or severe car crash, automatically help connect you with emergency services, and notify your emergency contacts.* Check In can automatically notify a loved one when you’ve arrived at your destination.
- A POWERFUL FITNESS TRACKER—With advanced metrics and motivating features like Pacer, Heart Rate Zones, training load, and Workout Buddy powered by Apple Intelligence from your nearby iPhone*—Series 11 is made to help everyone stay active, from runners and hikers to strength-training enthusiasts.
| Series 11 | Ultra 3 |
|---|---|
| 42mm or 46mm cases; aluminum or titanium | 49mm titanium case |
| Up to 24 hours’ battery life | Up to 42 hours, or up to 72 hours in Low Power Mode |
| 5G cellular capability | 5G, satellite SOS, satellite messaging and location sharing away from cellular and Wi-Fi |
| Everyday-focused design | 1Hz always-on display, up to 3000 nits, dual-frequency GPS, 100-meter water resistance and a 40-meter depth gauge |
Series 11 also has a display cover glass Apple describes as twice as scratch-resistant as the previous generation. Details are in Apple’s Series 11 announcement and Ultra 3 announcement.
Should existing owners upgrade?
Series 8 or older
Series 11 is a substantial health and hardware step if you want current sensors, longer support and the latest safety features. Ultra 3 makes sense only if its battery, titanium construction, GPS or satellite functions fit your use.
Rank #4
![Apple Watch SE 3 [GPS 40mm] Smartwatch with Starlight Aluminum Case with Starlight Sport Band - S/M. Fitness and Sleep Trackers, Heart Rate Monitor, Always-On Display, Water Resistant](https://m.media-amazon.com/images/I/31YiTby0pOL._SL160_.jpg)
- GET SMARTER HEALTH INSIGHTS—Apple Watch SE 3 is an advanced health tracker that helps you better understand your body. The smartwatch sends alerts for an irregular heart rhythm, or an unusually high or low heart rate.* You can view your overnight health tracking metrics with the Vitals app,* track your sleep score, and get sleep apnea notifications.*
- A GREAT FITNESS TRACKER—SE 3 can track your workouts in a healthy number of ways—from running and strength training to simply achieving your 10K steps a day. With real-time metrics and Workout Buddy powered by Apple Intelligence from your nearby iPhone,* you’ll hit your goals like never before.
- KEEP HELP CLOSE AT HAND—SE 3 is a smartwatch that can detect a hard fall or severe car crash and automatically help connect you to emergency services and notify your emergency contacts.* Check In can automatically notify a loved one when you’ve arrived at your destination.
- WOMEN’S HEALTH INSIGHTS—SE 3 has advanced sensors that track your wrist temperature while you sleep. With this smartwatch, you can log your periods and symptoms, get period predictions, and get notified of cycle deviations.*
- GREAT BATTERY LIFE AND FASTER CHARGING—Enjoy a smartwatch with all-day, 18-hour battery life* from sunup to sundown. Then charge up to twice as fast as SE 2* and get up to 8 hours of battery in just 15 minutes.*
Series 9, Series 10 or Ultra 2
Do not upgrade solely for hypertension notifications or sleep score. Those owners can receive the principal health updates through software, subject to the requirements above. Upgrade for battery, display, durability, cellular, GPS or satellite capabilities instead.
SE owners
SE 2 and later support sleep score through watchOS 26, but SE models are not eligible for hypertension notifications. Choose Series 11 if that alert is your priority.
Best Value
![Apple Watch Series 11 [GPS 42mm] Smartwatch with Space Gray Aluminum Case with Black Sport Band - S/M. Sleep Score, Fitness Tracker, Health Monitoring, Always-On Display, Water Resistant](https://m.media-amazon.com/images/I/41yzp82pFOL._SL160_.jpg)
- A FULL-FEATURED HEALTH TRACKER—Apple Watch Series 11 gives you invaluable insights about your body, right from your wrist. Take an ECG anytime* and get alerts for a high and low heart rate or an irregular rhythm*—so you can stay closer to your heart. You can also view your overnight health tracking metrics with the Vitals app* and be notified of possible sleep apnea.*
- KNOW YOUR SLEEP SCORE—With advanced sleep tracking, Series 11 gives you a daily sleep score. It’s an easy way to help measure and understand the quality of your sleep, so you can make it more restorative.
- GET HYPERTENSION NOTIFICATIONS—Did you know that Series 11 can spot signs of chronic high blood pressure? By analyzing how your blood vessels respond to beats of the heart, it can notify you of possible hypertension.*
- SAFETY FEATURES—A smartwatch that puts your safety first. Series 11 can detect a hard fall or severe car crash, automatically help connect you with emergency services, and notify your emergency contacts.* Check In can automatically notify a loved one when you’ve arrived at your destination.
- A POWERFUL FITNESS TRACKER—With advanced metrics and motivating features like Pacer, Heart Rate Zones, training load, and Workout Buddy powered by Apple Intelligence from your nearby iPhone*—Series 11 is made to help everyone stay active, from runners and hikers to strength-training enthusiasts.
Prices and buying guidance
Apple’s U.S. store listed Series 11 from $399 and Ultra 3 from $799 in the pricing information checked August 16, 2026. A 42mm GPS aluminum Series 11 was listed at $399, 46mm GPS aluminum at $429, GPS plus Cellular aluminum at $499, and titanium configurations from $699. Final cost varies with case, band, cellular service, taxes, promotions and trade-in credits. Check the Series 11 buying page and Ultra buying page before ordering.
Choose Series 11 when
- You want the new health features at the lower current price.
- You prefer a smaller, lighter everyday watch.
- You do not need satellite communication, extreme battery life or advanced outdoor GPS.
Choose Ultra 3 when
- You regularly hike, dive, snorkel, run long events or travel beyond reliable coverage.
- Battery endurance, titanium construction, dual-frequency GPS or satellite safety justify the premium.
- A 49mm case is comfortable and practical for you.
Consider SE 3 when
Apple lists SE 3 from $249 in its U.S. lineup. It supports sleep tracking, sleep score, sleep-apnea notifications and safety features, but not hypertension notifications or ECG. See Apple’s SE buying page.
Check these limitations before buying
- Health features may launch at different times by country and require local regulatory or language support.
- Blood Oxygen availability varies by market and model.
- Hypertension notifications can be unavailable because of an unsupported model or region, old iOS or watchOS, an iPhone older than 11, disabled Wrist Detection, pregnancy status, age, a prior diagnosis or insufficient data.
- Sleep score depends on wearing habits, fit, sleep schedule and sensor data quality; it cannot rule out a sleep disorder.
- Cellular and satellite functions require compatible service or coverage conditions; carrier plans are separate from the watch price.
Verdict
Series 11 is the sensible choice for most iPhone owners seeking Apple’s latest everyday health tracking. Ultra 3 is worth the extra cost for battery endurance, rugged outdoor hardware, advanced GPS, water capability or satellite safety—not for a fundamentally different health-monitoring system. If you already own Series 9, Series 10 or Ultra 2, install the supported software first: hypertension notifications and sleep score alone are not compelling reasons to replace your watch.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
Free tools Windows power users keep installed
One-click scans. No signup required.
