Apple Watch Ultra 4 is tipped to bring a faster S11 chip, enhanced health sensors, and improved power efficiency when it debuts alongside the iPhone 18 lineup.
Apple is expected to unveil the Apple Watch Ultra 4 next month alongside the iPhone 18 Pro, iPhone Ultra, and the rest of the iPhone 18 lineup, with leaks pointing to several meaningful upgrades for the premium smartwatch.
Among the most anticipated improvements are a faster processor, upgraded health-tracking capabilities, and better power efficiency that could translate into longer battery life.
Faster S11 chip to power Siri AI
One of the biggest rumored upgrades is Apple’s new S11 chip, which is expected to deliver a significant performance boost over previous generations.
According to Bloomberg’s Mark Gurman, the Apple Watch Ultra 4 will receive its first major processing upgrade since the introduction of the S9 chip in 2023.
The new processor is expected to enhance the experience of Siri AI, which will play a larger role in watchOS 27. A faster chip should make Siri more responsive and improve on-device performance for AI-powered features.
Enhanced health sensors and tracking
Health monitoring remains one of the Apple Watch’s biggest selling points, and the Ultra 4 is rumored to receive its largest sensor upgrade yet.
Reports suggest the number of sensor components inside the smartwatch could double, allowing Apple to introduce more advanced health-tracking capabilities.
One of the most anticipated additions is an improved high blood pressure notification feature, which is reportedly under review by the U.S. Food and Drug Administration (FDA).
While Apple has not confirmed any new health features, the upgraded sensors are expected to expand the watch’s wellness and fitness capabilities.
Better power efficiency could boost battery life
Battery life is another area expected to improve with the Apple Watch Ultra 4.
Reports indicate Apple has made significant gains in power efficiency, which could allow the smartwatch to run longer on a single charge.
Although Apple could use the additional internal space for new health sensors rather than a larger battery, improved efficiency alone may still provide noticeable battery life gains.
Longer battery life would help the Apple Watch compete more effectively with dedicated fitness wearables such as WHOOP and Fitbit, which are known for their extended endurance.
Apple Watch Ultra 4 launch expected next month
Apple is widely expected to introduce the Apple Watch Ultra 4 during its September launch event alongside the iPhone 18 family.
While Apple has yet to officially confirm the device or its specifications, the rumored upgrades suggest the Ultra 4 could be the most significant Apple Watch refresh in recent years, particularly for users interested in AI-powered features, advanced health monitoring, and improved battery performance.