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Apple Watch Series 12 brings together heart-rate and HRV tracking, sleep and readiness scores, ECG, and several health notifications. Apple lists a U.S. starting price of $399 and up to 24 hours of normal-use battery life. Those are manufacturer claims: the available evidence is Apple’s product page, not an independent review or accuracy test.
What health features does Apple Watch Series 12 offer?
Apple describes Series 12 as using a redesigned Health Sensing System. Its product page says the watch takes background heart-rate readings every five seconds and HRV readings as often as every five minutes. Apple also claims it has “the most accurate heart rate sensing in a wearable.” That superlative is Apple’s claim, not an independently established result.
Readiness and sleep scores
Apple says the readiness score draws on recent activity, vitals, and sleep to help users gauge whether to rest or push themselves. The sleep score reflects factors including sleep duration, bedtime consistency, awakenings, and sleep stages. These scores summarize tracked signals; the product information does not establish their accuracy or clinical usefulness independently.
ECG and heart-health notifications
Apple describes the ECG app as producing a single-lead electrocardiogram that can check for signs of atrial fibrillation. Its hypertension feature analyzes patterns over 30-day periods and can notify users of patterns suggestive of hypertension. These functions provide readings or notifications; they do not establish a diagnosis or replace clinical care.
#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.
Cycle tracking
Apple lists period and fertile-window predictions, retrospective ovulation estimates, and notifications about patterns suggestive of perimenopause. Predictions and pattern notifications are estimates or signals, not definitive medical conclusions.
Blood oxygen and sleep apnea
Apple lists blood oxygen readings and sleep-apnea notifications among the watch’s health features. Availability and feature details can depend on country and software version, so check Apple’s current information for your region before relying on a particular function.
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.
Which features are available now, and which are still forthcoming?
Apple’s product page distinguishes some upcoming software features from the health tools it lists for Series 12. The redesigned Health app is described as coming late in 2026, as are some Audio Intelligence features in beta. Treat those as forthcoming, not as features already available at launch or today; timing and access may change.
How long does the battery last?
Apple rates Series 12 for up to 24 hours of normal use. It also says a 15-minute charge can provide up to 12 additional hours of battery life. Both figures are Apple’s specifications, not results from independent testing; actual runtime will depend on use and settings.
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.
How much does Apple Watch Series 12 cost?
Apple’s U.S. product page listed a starting price of $399 when accessed on October 7, 2026. Prices are time-sensitive and vary by market and configuration, so verify the current price in your country before buying.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What should you check before choosing it?
- Regional availability: Confirm that the specific health features you want are offered where you live.
- Software timing: Separate currently available features from those Apple labels as coming later in 2026.
- Health expectations: Treat scores, estimates, ECG readings, and notifications as tracking tools rather than diagnoses.
- Evidence for accuracy: Apple makes an accuracy superlative, but the product information cited here does not provide an independent test to verify it.
Source: Apple Watch Series 12 product page (official U.S. page, accessed October 7, 2026).
Quick Recap
Rank #4
![Apple Watch Ultra 3 [GPS + Cellular 49mm] Running & Multisport Smartwatch w/Rugged Titanium Case w/Blue/Bright Blue Trail Loop - M/L. Satellite Communications, Advanced Health & Fitness Tracking](https://m.media-amazon.com/images/I/51SKumOyv8L._SL160_.jpg)
- RUGGED AND READY TO GO—The ultimate sports and adventure smartwatch is built to last with an extremely tough titanium case and a strong sapphire crystal display. Water resistant up to 100m—it’s great for swimmers, divers, and fans of high-speed water sports.*
- A FULL-FEATURED HEALTH TRACKER—Ultra 3 can take an ECG* and check your heart rhythm for signs of AFib—right from your wrist. The smartwatch sends alerts for possible hypertension,* 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 take readings of your blood oxygen.*
- ULTIMATE RUNNING AND WORKOUT COMPANION—A superior fitness tracker for marathoners, triathletes, mountain bikers, backcountry hikers, and mountain climbers, Ultra 3 provides precision dual-frequency GPS, Pacer, Heart Rate Zones, Custom Workouts, running power, Workout Buddy powered by Apple Intelligence from your nearby iPhone,* training load, and more.
- KEEP HELP CLOSE AT HAND—Ultra 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.
- MULTIDAY BATTERY LIFE—Ultra 3 is a smartwatch that’s engineered to give you even longer battery life. It’s perfect for trail runners—with up to 42 hours of normal use and up to 72 hours in Low Power Mode.* Track a workout with full GPS and heart rate monitoring for up to 20 hours in Low Power Mode.*
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.
