- Announced features may have different release dates.
- Manufacturer claims are not independent measurements.
What Apple says is new
Apple introduced Watch Series 12 with the S11 chip and a redesigned health-sensing system. The company describes changes to ongoing heart-rate measurement and new readiness-related experiences. Pre-orders begin September 9, with availability from September 18 in the initial markets.
Separate hardware from feature timing
Some capabilities described in the announcement arrive later or depend on software, language and region. Read those conditions before treating every announced feature as available on the first day.
What this article does not establish
This is coverage of Apple’s claims, not a TLB hands-on assessment or a medical evaluation. Measurement accuracy, everyday usability and battery behavior require appropriate testing. Readers comparing devices should identify the specific feature they need, its availability and the evidence supporting it rather than relying on a single launch headline.
Read beyond this page.
Recorded source-check date: 10 Sep 2026. A link is not, by itself, evidence that every claim has been independently verified.
Changes & version history
Version 3 · 10 Sep 2026
Scheduled release of checksum-bound AI-assisted editorial review
Version 2 · 10 Sep 2026
Checksum-bound editorial review scheduled for release
Version 1 · 10 Sep 2026
Source-linked private review edition