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Apple Watch Series 12 starts at $399 in the U.S. and adds Apple’s new health-sensing system, a Readiness score, updated step tracking, and audio-intelligence features. Apple lists 42mm and 46mm sizes, aluminum, titanium, and ceramic cases, and GPS or GPS + Cellular options. The right choice depends mainly on wrist fit, preferred finish and weight, and whether you need connectivity without your iPhone nearby.
What’s new on Apple Watch Series 12?
Apple announced Series 12 on September 9, 2026, with in-store availability beginning September 18. The changes are concentrated in health sensing, training guidance, battery and charging claims, and software features. The specifications below are Apple’s announcements and estimates, not independent test results.
Health sensing and heart-rate tracking
Apple says Series 12 pairs new optical and electrical heart sensors with its S11 chip. Apple states that the watch measures heart rate every five seconds throughout the day and measures heart-rate variability (HRV) up to 24 times more often than its predecessor.
Apple also says a study involving more than 1,000 participants compared its watch with leading wearables and found Apple Watch had the highest heart-rate accuracy in that study. That is a company-reported result; the cited announcement does not establish an independently published or peer-reviewed study. Apple’s health and fitness features are for wellness purposes, not diagnosis or medical treatment.
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![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.
Readiness score
The new Readiness feature combines recent activity, training load, vitals, and sleep score into a score from 0 to 10. Apple says it can offer prompts such as “Recover,” “Pace Yourself,” “Ready,” or “Go For It,” and updates as new data arrives. Treat it as a wellness and training cue—not a medical assessment, a guarantee that you are ready to exercise, or a substitute for how you feel.
Step tracking
Apple says it redesigned its pedometer model using machine-learning algorithms to improve step counts and indoor walk/run distance measurement. Apple calls Series 12’s step tracking the most accurate of any smartwatch. That superlative is Apple’s claim, not an independently established comparison in the cited launch materials.
Audio Intelligence and Siri features
Apple describes several audio and assistant features: Sound Recognition alerts for sounds such as alarms, sirens, doorbells, or a baby crying; Live Rewind, which displays a text snippet from the previous 15 seconds; Siri Recap, which creates a high-level conversation summary; and Shazam for identifying nearby music. Apple says Audio Intelligence is opt-in and includes privacy protections.
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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.
How much does Apple Watch Series 12 cost?
Apple lists a U.S. starting price of $399. It is a “from” price, not the price of every size, case material, or GPS + Cellular configuration. Apple announced availability across the U.S., UK, Canada, France, Germany, India, Japan, the UAE, and more than 50 other countries and regions; local prices and availability vary.
For regional context, T3 reported the following aluminum starting prices at review time. These are secondary-source price reports, not a full Apple price table; retailer, tax, date, and configuration can change what you pay.
| Aluminum size | UK | U.S. | Euro price | Australia |
|---|---|---|---|---|
| 42mm | £369 | $399 | €449 | A$649 |
| 46mm | £419 | $449 | €499 | A$739 |
Apple also describes an eligible U.S. Apple Upgrade option: a lease through Klarna with 12- or 24-month terms and payments starting at $11.99 per month for 24 months. This is a lease, not an outright purchase or loan; approval, eligibility, trade-ins, and obligations at lease end apply. It should not be confused with the $399 purchase starting price.
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Choose by wrist fit and how much display area you want. Apple lists the following fit ranges and display areas:
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![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.
| Case size | Apple-listed wrist fit | Display area |
|---|---|---|
| 42mm | 130–200mm | 970 sq mm |
| 46mm | 140–245mm | 1,196 sq mm |
The 46mm model has the larger display, while the 42mm model is the smaller option. The stated wrist ranges overlap, so they are a useful fit check rather than a guarantee of comfort; try the size on if possible, especially if you are between sizes.
Which case material and finish should you choose?
Apple lists aluminum, titanium, and ceramic cases. The material changes weight and front-glass construction. Apple says aluminum uses Ceramic Shield 2, while titanium and ceramic have a sapphire front crystal.
| Case size | Aluminum GPS | Titanium | Pearl White ceramic | Night Blue ceramic |
|---|---|---|---|---|
| 42mm | 32.2g | 36.5g | 41.7g | 42.8g |
| 46mm | 39.5g | 44.9g | 51.3g | 52.9g |
These are Apple-listed weights. Aluminum is the lightest listed option; ceramic is the heaviest. Apple’s U.S. starting price does not establish what titanium or ceramic configurations cost, so compare the live price for the exact combination you want.
GPS or GPS + Cellular?
Choose GPS + Cellular if you want the watch to connect through a cellular network when your iPhone is not with you. Apple says cellular service requires a wireless service plan, so check carrier compatibility and recurring plan costs before choosing it. If you normally carry your iPhone or do not need independent connectivity, GPS avoids that added service requirement.
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![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.*
How long does the battery last, and how fast does it charge?
Apple estimates up to 24 hours of normal use, up to 38 hours in Low Power Mode, and up to 10 hours of outdoor workout use. Apple describes the outdoor workout figure as 25 percent more than the previous model. For charging, Apple says 15 minutes can provide up to 12 hours of normal use, about 30 minutes can reach up to 80 percent, and a five-minute charge can provide up to 10 hours of sleep tracking.
These are manufacturer estimates, not guarantees. Apple says its battery and charging tests used preproduction devices and prerelease software in July and August 2026, under specified conditions that included notifications, workouts, sleep tracking, Bluetooth or cellular use, and a 20W adapter for charging tests. Actual results vary with configuration, network and signal, settings, use, and environment. Plan around an everyday watch with a stated up-to-24-hour normal-use estimate, rather than a multi-day battery.
What iPhone and software do you need?
Series 12 requires an iPhone 11 or later, including iPhone SE (2nd generation or later), running iOS 27 or later. Some Apple Intelligence features require a compatible Apple Intelligence-enabled iPhone 16 or later (excluding iPhone 16e), and availability can also depend on language, region, and rollout. Apple says technical features may vary by region, language, and software.
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Which Apple Watch Series 12 should you buy?
- Choose 42mm if its fit range suits your wrist and you prefer the smaller display and case.
- Choose 46mm if you prefer the larger display and its listed wrist-fit range works for you.
- Choose aluminum if low listed weight is a priority; choose titanium or ceramic for their different materials and sapphire front crystal.
- Choose GPS + Cellular only if independent connectivity is useful enough to justify checking carrier support and a service plan.
- Check the iPhone requirement before ordering, particularly if you want Apple Intelligence features with stricter device or regional requirements.
- Compare the exact configuration’s live price. Size, material, and cellular connectivity can change the cost beyond Apple’s U.S. starting price.
Apple says Series 12 contains 40 percent recycled material overall, including 100 percent recycled aluminum in the aluminum case and 100 percent recycled titanium in the 3D-printed titanium case. Apple’s vice president of Worldwide Apple Watch Product Marketing, Kaiann Drance, called it “the most advanced health and fitness companion we’ve ever created”—Apple’s launch description rather than an independent assessment.
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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.
