Apple Watch Series 12 and Ultra 4 launch with AI Audio Intelligence and conversation recaps

Apple introduced the Apple Watch Series 12 and Apple Watch Ultra 4 at its September 9 event in Cupertino, and the biggest changes are on the software side rather than in the hardware. According to TechCrunch, the two watches arrive with a collection of "Audio Intelligence" features aimed at the growing wave of AI wearables, including tools that transcribe and summarize what people say around you.

Siri can now rewind and recap conversations

The most talked-about addition is Live Rewind. A double press of the Digital Crown pulls up a text snippet covering the previous 15 seconds of a conversation, letting users catch something they missed. From there, Siri can be asked questions about the transcript, or the snippet can be saved to the new Siri app for later reference. Both TechCrunch and The Verge describe the feature identically.

Siri Recap goes further: when switched on, it uses ambient listening to take high-level notes of conversations throughout the day. After a conversation ends, Apple Intelligence automatically generates a title and key points in the Siri app. TechCrunch cites examples such as takeaways from a team meeting or a parent-teacher conference, with Apple framing it as a way to stay present rather than take notes.

The Audio Intelligence suite also includes Sound Recognition, which alerts users who are deaf or hard of hearing to sounds such as sirens, alarms, doorbells and a crying baby. The Verge notes it runs on-device and works even when the iPhone is not nearby. A Shazam integration rounds out the set, automatically surfacing song titles and artists in the Smart Stack widget.

Availability is staggered. The Verge reports that Live Rewind and Siri Recap will arrive in beta later this year on both new watches, starting with English. TechCrunch adds Apple's claim that these audio features do not create or store audio recordings, an important assurance for features built on always-listening microphones.

Health sensing gets a significant upgrade

The health hardware received more attention than the industrial design. TechCrunch describes a new sensing system with a larger electrode surface area for ECG readings, photodiodes rearranged in a ring to capture light more efficiently, and more power-efficient green LEDs that keep heart-rate readings accurate during movement. Background heart-rate measurements now happen every five seconds throughout the day, which Apple says is 60 times more frequent than before.

Both watches add a readiness score in the vein of smart rings, combining recent activity, vitals and sleep into a single morning figure, plus a Health Age feature that compares metrics such as VO2 max and sleep against the user's actual age. The Verge reports that Cycle Tracking now covers perimenopause and menopause, the Health app has been redesigned with Insights and Longevity tabs, and an iPhone camera combined with the watch can run physical assessments of flexibility, strength and balance analyzed by on-device AI. A VO2 max assessment is available with AirPods Pro 3 or third-party heart-rate hardware.

Pricing, battery and a new CEO

The Series 12 runs on a new S11 chip and comes in aluminum, titanium and ceramic cases. The Verge reports battery life during outdoor workouts is up 25 percent to 10 hours, with fast charging adding up to 12 hours in 15 minutes. The aluminum Series 12 starts at $399, with titanium at $699 and ceramic at $899, while TechCrunch puts the Ultra 4 at $499. The watches launch September 18, with preorders open since announcement day and leasing from $11.99 per month.

The Verge also notes this is among the first product launches under new Apple CEO John Ternus, who replaced Tim Cook on September 1 and previously oversaw Watch development as head of hardware engineering. Smartwatch prices held steady even as other Apple products saw price increases earlier this year.

Why it matters

With a modest hardware refresh, Apple is positioning AI as the reason to buy its watches. Bringing ambient listening and automatic conversation summaries to a mass-market wearable mainstreams capabilities that have so far lived in niche AI devices, and Apple's insistence that recordings are never created or stored will be central to whether users trust the feature. It also signals where wearable competition is heading: not more sensors alone, but AI layered on top of them.