watchOS 27 brings Apple's new AI-powered Siri, expanded health features, and smarter everyday tools to the Apple Watch. As anticipated, watchOS 27 didn't bring a massive overhaul, but instead brought the device in line with the rest of the Apple ecosystem.

Siri now holds back-and-forth conversations, stores them in a dedicated app, and accesses personal data across Calendar, Mail, Messages, Notes, and Reminders. It can share flight details, play songs, and add Activity goals. Siri also has broad world knowledge for recipe ideas, wellness tips, and transit schedules.

Health & Wellness: A redesigned Workout Buddy offers insights based on fitness history and no longer requires an iPhone nearby. Indoor running is more accurate with improved motion tracking. Perimenopause and menopause support alerts users to cycle patterns.

General improvements: A new one-tap gesture selects Smart Stack widgets. Smart Stack suggestions now include birthdays, car locations, and alarm changes. Find My is streamlined. Call Context surfaces confirmation codes. Other tweaks: faster music playback, improved step sync, and battery optimization.