Apple Routes Apple Watch Siri Through iPhone to Ensure Consistency

Apple's new Siri AI on watchOS 27 doesn't run locally on the Watch; instead, requests route through a paired iPhone. The architecture trades hardware isolation for shared conversation history and identical answers across devices. Early testers report noticeable processing latency—a friction point on a device designed for quick glances. Apple's engineering lead emphasized parity as the central goal: users should get the same response whether asking Siri on wrist or phone.