Apple has officially announced the Apple Watch Ultra 4, Powered by the new S11 SiP and a new Health Sensing System, the rugged smartwatch delivers Apple’s most accurate heart rate monitoring to date alongside an actionable daily readiness score.
The flagship sports watch starts at $1,099 CAD, with pre-orders open today and official retail availability beginning Friday, September 18.
Re-Architected Health Sensing System, 5-Second Measurements, and High-Frequency HRV
The heart rate architecture receives an overhaul featuring a high-efficiency green LEDs and updated optical and electrical sensors.
Heart rate measurements now occur passively every five seconds throughout the day, significantly refining Activity Ring calculations and powering a real-time watch face complication.
Heart rate variability monitoring is expanded up to 24 times more frequently, categorizing data into Recovery HRV for daily recovery tracking and Overall HRV for broader cardiovascular health.
In addition, a new daytime vitals view complements overnight sleep metrics, helping users detect subtle physiological changes prior to their appearance overnight.
Daily Readiness Insights and Re-Engineered Machine Learning Pedometer Tracking
Apple Watch Ultra 4 debuts readiness, an intelligent health metric evaluating recent activity levels, training load, overnight vitals, and sleep consistency.
Each morning presents a 0–10 readiness rating paired with clear guidance: Recover, Pace Yourself, Ready, or Go For It.
The score adapts dynamically as fresh workouts or daytime physiological metrics are registered throughout the day.
Audio Intelligence with Secure Exclave, Live Rewind, and Siri Recap
On the S11 processor and with on-device machine learning, the Apple Watch Ultra 4 introduces private Audio Intelligence capabilities.
The hardware incorporates Secure Exclave, a dedicated isolated compartment that processes audio locally and purges raw recordings instantly without operating system access.
Double pressing the Digital Crown activates Live Rewind, displaying the prior 15 seconds of spoken conversation as an on-screen text snippet accompanied by an audible chime and visible indicator.
Siri Recap automatically compiles concise, high-level summaries of conversations within the Siri application, while Sound Recognition alerts users to sirens, alarms, and doorbells directly from the wrist.
Up to 84-Hour Battery Endurance, Fast Charging, and Rugged Design
Battery life stretches up to 50 hours of regular daily use and reaches up to 84 hours in Low Power Mode.
Rapid charging capabilities restore up to 18 hours of battery endurance with a brief 15-minute charge.
Encased in a 49mm aerospace-grade titanium chassis available in Natural and Black titanium, the wearable utilizes 100 percent recycled titanium and 45 percent overall recycled materials.
watchOS 27, Siri AI Integration, and Fresh Band Options
Running watchOS 27, the Ultra 4 integrates conversational Siri AI with personal context awareness, dynamic 5-app Siri grids, and a single-handed finger tap gesture to open Smart Stack widgets.
New accessory colorways include Dark Umber, Sand, and Burgundy for Trail Loop; Desert, Dark Olive, and Burgundy for Alpine Loop; and three translucent silicone shades for Ocean Band.
The luxury Apple Watch Hermes Ultra 4 also debuts with an extendable Grand H titanium wet suit band and exclusive four-depth Fathom and Wonder dials.
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