Apple unveiled watchOS 27 at its fall software event, centering the update around a new AI‑driven Siri that responds to natural language and pulls context from the wrist. The OS reshapes the app grid, placing Siri front‑and‑center while surfacing frequently used shortcuts and predictive app suggestions.

Health gains a dedicated focus as the Watch’s period tracker now flags irregularities linked to perimenopause and menopause. When patterns deviate, users receive educational prompts and guidance on symptoms to monitor, extending Apple’s push into women’s health. The same release adds offline AI support for the Workout Buddy app and Spanish language options.

Navigation sees a refined tap gesture: a single pinch of thumb and index finger summons the Smart Stack, letting users launch widgets without freeing a hand. Combined with bug‑fixes and performance tweaks reminiscent of a “Snow Leopard”‑style polish, the update readies for a Fall rollout, promising a more conversational watch experience and deeper health insights for existing users.