Apple Watch Ultra 4 launches in Italy on September 18, 2026, starting at €909, bringing continuous background health tracking, expanded battery capacities, and an upgraded S11 processor according to official company announcements.
Health Sensing System and Continuous Biometrics
The core hardware upgrade centers on the Health Sensing System, which according to Apple features larger, more efficient green LEDs and rearranged photodiodes to capture optical data more effectively. The device measures heart rate continuously every five seconds in the background, representing a 60-fold increase in frequency compared to the Apple Watch Ultra 3, as reported by Mister Gadget.
Heart rate variability (HRV) sampling also increases significantly. According to Mister Gadget, HRV measurements occur every five minutes—24 times more often than the previous generation. The updated Vitals app distinguishes between daytime and nighttime HRV baselines, allowing users to spot physiological shifts before they appear in overnight data.
Readiness Score and Recovery Analytics
A new Readiness metric evaluates daily recovery on a scale from zero to ten. According to Apple, the algorithm processes recent activity, training load, vital signs, and sleep quality each morning to output actionable guidance categories: Recover, Pace Yourself, Ready, or Go For It. The score dynamically updates throughout the day following intense exercise sessions.
Apple developed the underlying algorithm using data from the Apple Heart and Movement Study, partnering with sports physiologists and clinicians. Accompanying software updates in the Health app introduce a Longevity tab featuring Health Age, which benchmarks user physiological parameters against chronological age norms.
Battery Life and Power Modes
Battery performance expands to 50 hours during standard use, while low-power mode extends operation up to 84 hours according to Apple. For outdoor athletes, Extended Workout mode provides 25 hours of active GPS and heart rate tracking—a 25 percent increase over the prior model—while Max Extended Workout mode stretches outdoor tracking to 45 hours.
Fast-charging capabilities deliver up to 18 hours of normal use from a 15-minute charge. The titanium aerospace-grade chassis retains a 100-meter water resistance rating, compliance with MIL-STD-810H durability standards for extreme environments, and IP6X dust resistance.
Audio Intelligence and Processing Power
Powered by the S11 chip, the wearable introduces local audio processing capabilities designed for privacy. According to Mister Gadget, features like Live Rewind display the last 15 seconds of a conversation as text, while Siri Recap generates automated summaries after discussions conclude. Sound Recognition alerts users to important environmental noises, such as sirens or crying babies.
Apple states that raw audio data is processed locally on the device and deleted immediately without recording or storing sound files. Audio Intelligence features roll out via beta updates later in the year, though regional availability restrictions apply at launch.
Pricing and Availability in Italy
Apple Watch Ultra 4 releases in Italy on September 18, 2026, with a baseline retail price of €909. The device is offered in natural and black titanium finishes, paired with a variety of configurable sport and adventure bands.