Overview
- Apple introduced the Watch Series 12 with a new S11 system‑on‑chip and upgraded optical and electrical sensors that it says enable more frequent on‑device processing.
- The company says the watch records heartbeats about every five seconds and greatly increases heart‑rate‑variability sampling to produce finer daily signals for stress and recovery.
- A new watchOS 27 feature called Disposición gives a 0–10 score that combines recent activity, training load, sleep, heart rate and HRV to advise users to rest, reduce intensity, prepare, or train hard.
- Apple advertises modest battery and charging gains with up to 24 hours of typical use, about 10 hours for outdoor workouts, and a fast charge that adds roughly 12 hours from 15 minutes.
- The Series 12 is available for preorder in many markets from roughly $399 / €449, comes in 42mm and 46mm sizes with aluminum, titanium and new ceramic finishes, and Apple’s accuracy claims rest on its own study of more than 1,000 people rather than independent validation.