GoKawiilApple Watch Ultra 4 Adds 32-Electrode Sensor Array and Real-Time Readiness Score
Apple's new $799 Watch Ultra 4 pairs a redesigned sensor array—32 electrodes arranged like flower petals—with the new S11 chip, enabling heart-rate readings every 5 seconds and HRV checks every 5 minutes, far more frequent than prior models. That increased sampling powers a new Readiness score that updates throughout the day rather than relying mainly on overnight data, plus a Daytime toggle in the Vitals app to view daytime alongside nighttime metrics.
GoKawiil's interpretation of the reporting above, not reported fact.
Faster, denser biometric sampling could make Apple's wearable data genuinely useful for real-time training and recovery decisions rather than just after-the-fact summaries, a gap competitors like Whoop and Garmin have tried to fill. It also signals Apple is pushing health tracking as a core differentiator for its priciest smartwatch tier.
- Ultra 4 measures heart rate every 5 seconds and HRV every 5 minutes, up from far less frequent checks before
- A new 32-electrode sensor design and S11 chip enable the higher sampling rate
- A Readiness score now updates in real time throughout the day instead of only reflecting overnight recovery
Apple Ocean Band for Apple Watch Ultra — If you're eyeing the latest Apple Watch Ultra, the Ocean Band is the natural companion for a watch built around water sports and rugged wear. Its stretchy tubular design and titanium buckle keep the case snug against your wrist, which also helps those back-of-the-watch heart sensors stay in solid contact during workouts.
See Apple Ocean Band for Apple Watch Ultra on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: cnet.com — Vanessa Hand Orellana, 2026-09-10
Published there as: “Apple Watch Ultra 4 Hands-On: A Closer Look at Its Biggest Upgrades”
Read the original report → The summary and analysis above are GoKawiil's own, written from reporting by the source above. Facts and quotes belong to the original publisher.