Overview
- watchOS 27 introduces a conversational Siri experience and a dedicated Siri app that stores and revisits conversations alongside UI changes like a dynamic app grid and Smart Stack suggestions.
- Apple confirmed the update will only run on S9‑class and newer models, specifically Series 9–11, Apple Watch SE 3, and Apple Watch Ultra 2–3, leaving Series 6–8, SE 2, and the original Ultra without the new features.
- Siri AI on the watch depends on Apple Intelligence and requires a compatible iPhone to work, with reporting indicating an iPhone 15 Pro or later is needed for the wrist‑based AI features.
- watchOS 27 is in developer beta now, with a public beta expected in July and a broad release planned for this autumn, and Apple says it focused on performance, battery gains, and disabling little‑used features to preserve runtime.
- Analysts and users warn the stricter silicon cutoff could shorten practical software life for many recent watches and that Apple’s hybrid architecture and regional rules will stagger which devices and countries receive the cloud‑backed AI features first.