Apple Watch Ultra 4 Unveiled: 45-Hour Battery, S11 Chip, Health Sensors and GPS
Apple has unveiled its latest high-end smartwatch for athletes, outdoor enthusiasts and adventure users: Apple Watch Ultra 4.
The new iteration brings Apple's Health Sensing System and the S11 chip, better fitness data, better GPS and more battery life.
New Health Sensing System.
One of the most significant improvements in Apple Watch Ultra 4 is the introduction of the Health Sensing System.
According to Apple the system is able to measure heart rate with the greatest accuracy of any wearable.
Additionally, the watch can record the heart rate and HRV at a higher rate.
These measurements are meant to complement Apple's new readiness feature.
Readiness for Training and Daily Activity
The new Readiness feature, which aims to provide users with an understanding of their day's capacity, is present in Apple Watch Ultra 4 as well.
The feature takes into account recent activity, training load, sleep, etc., and other health-related information.
The outcome is a score of 0 to 10 that can assist a user to determine whether they need to recover, to pace or to continue with the activity that they had planned.
This might be better suited to athletes, perhaps as a training and recovery aid.
S11 Chip
Apple Watch Ultra 4 is powered by Apple's S11 chip.
The chip supports health sensing, fitness tracking and new intelligence.
It additionally sustains Apple's new Audio Intelligence experiences coming with watchOS 27.
Up to 45 Hours for Outdoor Workouts
The Ultra line and Apple's standard Watch models stand out in many ways, most notably with their battery life.
According to Apple, Apple Watch Ultra 4 can enjoy up to 45 hours of battery life with outdoor workouts.
This is especially useful for longer sessions when charging by the power cord is impractical.
Improved GPS Accuracy
In addition, Apple says that Ultra 4's GPS on-device signal is the most accurate one of any sports watch.
It is particularly important to position correctly when running, hiking, cycling and other endurance activities out of doorways.
Redesigned Health App
Also on the horizon are other changes that will be made to the Health app on the iPhone later this year.
The new application will have a new section called Longevity and a Health Age feature.
These tools will be used to let the user know how their health measures are doing compared to their age.
Audio Intelligence
The S11 chip also enables new Audio Intelligence capabilities.
These properties may be useful to help the user be aware of significant sounds and to recall information from conversations.
Impetus is placed on privacy, security and accessibility when developing the technology.
Siri AI
Apple Watch Ultra 4 will also be able to take advantage of Siri AI with watchOS 27.
The new Siri can have a broader knowledge and answer to questions in light of personal context.
This is further steps toward making Apple Watch an intelligent assistant—rather than a fitness tracker.
Price and Availability
Apple Watch Ultra 4 will be priced at $799 in the U.S.
Pre-orders are available now.
The watch will hit the shops from September 18, 2026.
Pre-orders are available in some countries, including India.
Final Thoughts
Apple Watch Ultra 4 builds on Apple's outdoor sports, fitness and adventure emphasis.
With its Health Sensing System, S11 chip, readiness score, enhanced GPS and up to 45 hours of battery life for outdoor workouts, it's a strong choice for athletes and outdoor enthusiasts.
Ultra 4 is Apple's flagship smartwatch, designed for those seeking extended battery life and advanced fitness tracking.
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