Apple Watch Ultra 3 and Series 11: Thin Design, Advanced Health Features, and a New Chip

Liputan6.com, Jakarta Apple recently released the latest Apple Watch Series 11, along with the Apple Watch Ultra 3 and Apple Watch SE 3, in September 2025.

The launch event, which took place on September 9, 2025, was a highlight for technology and health enthusiasts.

“Apple Watch is the world’s most popular watch, using advanced sensing capabilities to empower millions of people around the world to better understand their health simply by wearing it, while also serving as a fitness coach, message center, mobile wallet, and beautiful timepiece,” said Stan Ng, Apple’s vice president of Apple Watch and Health Product Marketing.

The Apple Watch Series 11 is available for pre-order today, with availability starting Friday, September 19.

The Apple Watch Series 11 is available in aluminum in a new space gray color, as well as jet black, rose gold, and silver, and also in polished titanium in natural, gold, and slate.

The Apple Watch Series 11 is the thinnest Apple Watch model ever, with a thickness reduction of approximately 10 percent compared to previous models like the Series 7, 8, and 9.

This design change aims to provide greater comfort for users without sacrificing performance or durability.

Furthermore, the Apple Watch Series 11 features a more energy-efficient and higher-resolution display, utilizing MicroLED display technology.

This technology promises higher pixel density, superior resolution, and significantly brighter images than current OLED displays, improving visibility in direct sunlight.

Design innovations also include a redesigned metal back, where the antennas will be integrated directly into the device's casing.

Apple Watch helps millions better understand their health simply by wearing it.Today we introduced two powerful new features: one that will notify you if it detects signs of hypertension over time, and sleep score to give you more insight into the quality of your sleep. pic.twitter.com/f1cvPYy46Y

— Tim Cook (@tim_cook) September 10, 2025

Health monitoring features are one of the main attractions of the Apple Watch Series 11 and Apple Watch Ultra 3, with blood pressure monitoring and blood glucose tracking, according to Apple official website.

The blood oxygen sensor, previously the subject of a patent issue, is reactivated on the Apple Watch Series 11 thanks to the watchOS 11.6.1 update.

“Hypertension is the leading preventable cause of heart attack and stroke, yet millions remain undiagnosed,” said Harlan Krumholz, MD, SM, cardiologist and scientist at Yale University and Yale New Haven Hospital.

“Making accurate detection easy and part of daily life can help people get care earlier and prevent avoidable harm.”

On the software side, the Apple Watch Series 11 will run watchOS 26, bring a new "liquid glass" user interface and a suite of health and productivity tools.

Features like AI-powered Workout Buddy, live translation, and the Apple Notes app provide a smarter and more adaptive experience for Apple Watch Ultra 3 and Series 11 users.

“With powerful new health features — hypertension notifications and sleep score — plus longer battery life, a more scratch-resistant glass display, and 5G cellular, all in a thin and comfortable design users love, Apple Watch Series 11 is an indispensable companion that supports users’ health, fitness, safety, and connectivity throughout the day and night," Stan Ng, Apple’s vice president of Apple Watch and Health Product Marketing said.

The performance improvements on the Apple Watch Series 11 will be powered by an updated S11 chip.

However, based on internal code, the S11 chip is unlikely to offer significant improvements over the S10 chip, as it still uses the same T8310 architecture.

In terms of connectivity, the Apple Watch Series 11 and Apple Watch Ultra 3 have switched to the 5G RedCap technology.

Satellite connectivity is also possible, particularly for the Apple Watch Ultra 3, which will improve security and functionality in areas without cellular coverage.

The new models also featured improved battery life, with a target of 18 hours of typical use, as well as a water resistance rating of 50 meters.

The Apple Watch Ultra 3 keeps its unique features such as a depth gauge, water temperature sensor, and a customizable Action Button.