watchOS 27 Puts Apple Watch Heart Rate Tracking at Center Stage
Apple’s next smartwatch update is shaping up to be less about flashy new tricks and more about what happens under the hood. According to multiple reports, watchOS 27 features will revolve around stability, performance and a major overhaul of Apple Watch heart rate tracking rather than headline-grabbing additions. Insiders describe the upgrade as a substantial refinement designed to make readings more consistent and granular throughout the day. That kind of improvement could close the gap with dedicated trackers like Whoop and Oura, which are known for frequent, precise background measurements that fuel their coaching insights. Rather than adding new health categories, Apple appears focused on extracting more reliable data from existing wearable health sensors and algorithms. The move underscores a deliberate shift: enhance the core health signal quality first, then layer smarter software experiences on top later.
Project Mulberry: AI Health Coach Pushed Back After Internal Shifts
In contrast to the imminent heart rate upgrade, Apple’s highly anticipated AI health coach, internally codenamed Project Mulberry, is slipping further down the roadmap. Originally envisioned to launch alongside a redesigned Health app, the initiative has been scaled back and is now expected to arrive later in the iOS 27 update cycle, rather than as a marquee watchOS 27 feature. Mulberry is designed as a personalized digital wellness assistant, pulling together Apple Watch metrics such as activity, sleep and heart patterns, plus user surveys and even lab reports, to deliver tailored coaching and educational content. Apple reportedly built a dedicated content studio to produce health videos for the service. But recent organizational changes in the health division and broader leadership turnover have contributed to a more cautious rollout, leaving Apple Watch owners waiting longer for an AI-driven coaching experience.
Stability-First Strategy as Rivals Push AI-Driven, Screenless Wearables
Apple’s incremental approach is unfolding amid rising pressure from competitors who are redefining the wearable category. Companies like Oura and Whoop have built sizable businesses around minimalist rings and bands, prioritizing passive monitoring and AI-powered coaching instead of traditional smartwatch features. Google is reportedly preparing a screenless Fitbit Air, adding to the momentum behind stripped-down devices that feed rich insights back to the user. At the same time, Apple has seen key health and hardware talent depart to rivals, while its Health app is criticized as cluttered, clinical and weak on actionable guidance. Against this backdrop, a watchOS 27 release focused on refinement and reliability reads as a defensive move. Apple is choosing to harden its wearable health sensors and data pipelines even as others experiment aggressively with AI-led, screenless form factors and habit-building features.
Refining Sensors Now to Power Future AI Health Experiences
The emphasis on better Apple Watch heart rate tracking hints at how Apple sees the long game in wearable health. By improving the consistency and granularity of its core biometrics today, Apple is laying the groundwork for more capable AI-driven features tomorrow, including Project Mulberry. High-fidelity streams from wearable health sensors will be critical if Mulberry is to analyze subtle trends in stress, recovery or cardiovascular patterns and turn them into trustworthy recommendations. Apple executives reportedly acknowledge that simply collecting more data is not enough; what matters is turning those readings into clear, meaningful insights that help users change behavior. In that sense, watchOS 27’s restrained feature list may be strategic rather than conservative: a step toward a future in which Apple can marry robust sensor accuracy with a redesigned Health app and a sophisticated AI health coach that can finally rival specialized fitness platforms.