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Apple Watch Series 11 adds hypertension notifications and a nightly sleep score, alongside a claimed 24-hour battery life, tougher cover glass on aluminum models, and 5G cellular. Apple announced it on September 9, 2025, with availability beginning September 19 and a U.S. starting price of $399. The health features offer useful signals, but they do not replace medical diagnosis or care.
What’s new in Apple Watch Series 11?
The biggest changes are health insights and practical hardware updates. Apple’s announcement lists these headline additions:
- Hypertension notifications: The watch looks for patterns that may indicate chronic high blood pressure.
- Sleep score: A nightly rating summarizes sleep duration, bedtime consistency, awakenings, and time in sleep stages.
- Longer battery claim: Apple rates Series 11 for up to 24 hours under its specified test profile, which includes six hours of sleep tracking.
- More scratch-resistant aluminum glass: Aluminum models use Ion-X glass with a ceramic coating that Apple says is two times more scratch-resistant than Series 10 Ion-X glass.
- 5G cellular: Series 11 adds 5G capability and a redesigned antenna; support depends on market and carrier.
Apple offers aluminum in space gray, jet black, rose gold, and silver, and polished titanium in natural, gold, and slate. The U.S. starting price is $399. Apple’s announcement has the Series 11 launch details.
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Series 11 can issue a hypertension notification when its optical heart sensor and algorithm identify patterns consistent with chronic high blood pressure. It analyzes how blood vessels respond to heartbeats and evaluates data passively over 30-day periods. It is a screening feature—not a blood-pressure measurement or diagnosis—and Apple says it will not detect every instance of hypertension.
#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.
Apple says the algorithm was trained using multiple studies involving more than 100,000 participants and validated in a clinical study of more than 2,000 participants. Those study counts describe development and validation; they do not mean the watch can identify every person with hypertension.
What to do after a notification
- Use a third-party blood-pressure cuff to log readings for seven days.
- Share the readings with a healthcare provider and discuss what they mean.
Apple says hypertension notifications are not intended for people under 22, people already diagnosed with hypertension, or people who are pregnant. For feature details and eligibility, see Apple Support’s hypertension notifications guidance.
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![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.
What is the Apple Watch sleep score?
Sleep score is a nightly summary with an overall score and classification. Its breakdown covers four factors: sleep duration, bedtime consistency, awakenings, and time in each sleep stage. You can view it in the Sleep app, as a watch-face complication, in Smart Stack, or in the iPhone Health app.
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Apple says the scoring approach was informed by guidance from the American Academy of Sleep Medicine, National Sleep Foundation, and World Sleep Society. It used more than 5 million nights of Apple Heart and Movement Study data to develop and test the algorithms. The score is a way to review sleep patterns, not a diagnosis of a sleep disorder.
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.
Does Series 11 really have better battery life?
Apple claims up to 24 hours of battery life, including sleep tracking. Its stated test profile includes 300 time checks, 90 notifications, 15 minutes of app use, a 60-minute Bluetooth music workout, and six hours of sleep tracking across 24 hours. Apple rates Low Power Mode for up to 38 hours using a comparable profile. A 15-minute fast charge is claimed to provide up to eight hours of battery life.
These are Apple test results, not a guarantee for every wearer. Testing took place in July and August 2025 on preproduction units with prerelease software. Apple says actual battery life varies with use, configuration, cellular network, signal strength, and other factors. See Apple’s battery testing and claims for its methodology and qualifications.
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.*
How durable are the display and case options?
Aluminum Series 11 models use Ion-X glass with an Apple-designed ceramic coating. Apple claims this glass is two times more scratch-resistant than the Ion-X glass used on Series 10. Titanium models use sapphire crystal. These are different materials, so the scratch-resistance comparison applies specifically to aluminum glass versus Series 10 aluminum glass; it is not a claim that aluminum glass is more scratch-resistant than titanium sapphire.
Series 11 is available in 42mm and 46mm sizes. Choose a case material and size that suit your fit and preference, and check compatibility when selecting bands.
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.
Should you upgrade from Apple Watch Series 10?
Series 11 is a more compelling upgrade if you want its specific additions: hypertension notifications, sleep score, a longer stated battery allowance, 5G on cellular models where supported, or the updated aluminum cover glass. If those do not address a need you have, the announcement’s headline changes alone are not a reason every Series 10 owner must upgrade.
| Consideration | What Series 11 changes or offers | What to check before deciding |
|---|---|---|
| Health | Hypertension notifications and sleep score | Notifications are screening alerts, with eligibility limits; feature availability can vary by region and software. |
| Battery | Up to 24 hours in Apple’s specified test, including six hours of sleep tracking | Your results depend on use, configuration, and network conditions. |
| Durability | Ceramic-coated Ion-X glass on aluminum; sapphire crystal on titanium | The two-times scratch-resistance comparison is between Series 11 and Series 10 aluminum glass. |
| Connectivity | 5G capability on GPS + Cellular models | 5G availability depends on the market and carrier. Check the cellular option and local support. |
| Fit and cost | 42mm and 46mm sizes; U.S. starting price of $399 | Compare case material, size, and band compatibility with your current setup. |
Other health features have their own limits. Apple says Blood Oxygen measurements are for wellness purposes, not medical use. Sleep-apnea notifications are intended to detect signs of moderate to severe sleep apnea in adults without a diagnosis; Apple lists Series 9 and later, Ultra 2 and later, and SE 3 as supported models. ECG is available on supported models for users 22 and older. Availability can vary by region and software, so check Apple’s health-feature availability and requirements.
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