Apple rolls out Watch Ultra 4 and previews iOS 27 Expressive Voice feature

Apple introduced the Watch Ultra 4, highlighting new sensor capabilities and deeper Siri integration. The watch will run watchOS 27, which includes a more capable Siri AI. At the same time, Apple is preparing iOS 27, which will add an Expressive Voice option that lets compatible iPhone 17 Pro, Pro Max, Air models and M4‑chip iPads adjust Siri’s emotional tone and pacing, currently limited to American and British English. Users can already change Siri’s voice and response style in Settings on existing iOS and iPadOS devices. The updates aim to give users finer health data and more personalized AI interactions.