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Report: watchOS 27 to improve heart-rate tracking; AI health coach may not debut at launch

9to5Mac • Sun, 24 May 2026

Report: watchOS 27 to improve heart-rate tracking; AI health coach may not debut at launch

For the better part of a year, we’ve been hearing about Project Mulberry : Apple’s AI-powered health coach. Back in February, it was reported that these efforts had been scaled back. According to Bloomberg’s Mark Gurman , the features should still be on track for iOS 27, though they may not release until later in the cycle. On the other hand, Apple is apparently going to greatly improve Apple Watch heart-rate tracking with watchOS 27, which could tie in nicely with Apple’s eventual health coach. more…

What happened?

For the better part of a year, we’ve been hearing about Project Mulberry : Apple’s AI-powered health coach. Back in February, it was reported that these efforts had been scaled back. According to Bloomberg’s Mark Gurman , the features should still be on track for iOS 27, though they may not release until later in the cycle. On the other hand, Apple is apparently going to greatly improve Apple Watch heart-rate tracking with watchOS 27, which could tie in nicely with Apple’s eventual health coach. more…

Story details

For the better part of a year, we’ve been hearing about Project Mulberry : Apple’s AI-powered health coach.

Back in February, it was reported that these efforts had been scaled back.

According to Bloomberg’s Mark Gurman , the features should still be on track for iOS 27, though they may not release until later in the cycle.

Why it matters

This page keeps Apple rumors separate from official updates, so readers can follow early reports without confusing them with confirmed announcements.

Original source

https://9to5mac.com/2026/05/24/apple-improving-heart-rate-tracking-in-watchos-27-mulberry-health-coach-delays/