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

Michael Burkhardt· May 24, 2026 · 3:59 PM UTC ·4 min read · 0 reactions · 0 comments · 26 views

TL;DR · WeSearch summary

Apple's upcoming watchOS 27 is set to enhance heart-rate tracking features. However, the anticipated AI health coach, Project Mulberry, may face further delays in its launch. The focus for watchOS 27 will be on stability and performance improvements rather than major new capabilities.

Key facts

▪watchOS 27 will improve heart-rate tracking for Apple Watch users.
▪Project Mulberry, an AI health coach, has been scaled back and may not launch with iOS 27.
▪The redesigned Health app is still expected to debut in iOS 27, but the AI features could be delayed until later updates.

How this story was covered

4 outlets in our directory ran this story, first to last over 22 hours. All of the coverage we found sits in one bucket: centre. That one-sidedness is itself worth noticing.

Centre · 3

▪ New watchOS 27 Rumor Tips Better Heart-Rate Tracking, Delayed AI Health Coach — PCMag
▪ Report: watchOS 27 to improve heart-rate tracking; AI health coach may not debut at launch — r/apple
▪ Heart rate tracking improvements are about all that's expected in watchOS 27 — AppleInsider

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9to5Mac · Michael Burkhardt

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Original publisher	9to5Mac
Canonical URL	https://9to5mac.com/2026/05/24/apple-improving-heart-rate-tracking-in-watchos-27-mulberry-health-coach-delays/
Publication time	Sun, 24 May 2026 15:59:44 +0000
Retrieval time	2026-05-24T16:02:33.295Z
Last seen	2026-05-24T16:02:33.295Z
Headline source	Publisher (no WeSearch rewrite)
Excerpt source	publisher body
Excerpt method	First ~120 words (~800 chars) of extracted publisher body, fair-use limited.
Summary	WeSearch · cerebras-chat (WeSearch summarizer)
Summary source text	contentText
Citation coverage	Summary is a WeSearch-generated derivative; primary citation is the original publisher URL.
Cluster	dQA2j5fgvCHs · 4 stories
Cluster logic	Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison.
Ranking reason	Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking.
Publisher visit	Yes — open original
Substitutes article?	No — link-out required for full text

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Indexing	May the item be indexed (stored, ranked, made findable)?	Allowed
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AI summary	May WeSearch generate its own short summary of the article?	Limited
Retrieval / RAG	May the content be exposed for third-party retrieval-augmented generation?	Not asserted
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Commercial reuse	May the content be reused commercially?	Not permitted

Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.

Open original publisher → Source rights JSON → Machine-readable provenance → Rights framework → WESEARCH-STORY-PROVENANCE-V1

Opening excerpt (first ~120 words) tap to expand

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