Apple is expected to launch the Apple Watch Macrumors Series 12 next week during a September event. Key rumored updates for the Series 12 include an upgraded S-class chip for AI integration, an always-on heart rate sensor, and the return of a ceramic case option.
The upcoming Apple Watch Series 12 appears to be a transitionary device. While some reports suggest the updates are fairly minor upgrades, the hardware changes target specific gaps in Apple’s health tracking and AI capabilities. According to reporting from 9to5mac, the device will launch alongside the Apple Watch Ultra 4.
S-Class Chip and AI Integration
Apple is reportedly introducing an upgraded S-class chip, likely designated as the S12 or S11, to power the Series 12. This follows a period of relative stagnation in CPU improvements; the company skipped offering an S11 altogether and kept the S10 around last year, retaining the S10 for both the Series 11 and Ultra 3 models, according to Macrumors.
The new silicon is designed as the first Watch chip of the AI era. This hardware shift is intended to support Siri AI, which is a primary addition to watchOS 27. Beyond the voice assistant, the more powerful chip is expected to improve general performance and everyday feature responsiveness.
Continuous Heart Rate Monitoring and Wellness Metrics
One of the most significant functional shifts is the move toward an always-on heart rate sensor. Mark Gurman reports that the Series 12 sensor can continuously collect data throughout the day — not just when it senses you’re doing intense activity or at other random intervals.
This change brings Apple closer to the data collection models used by fitness trackers from Whoop and Oura. To complement the hardware, Apple is reportedly revamping its Health and Fitness apps to display more wellness-related metrics in a similar fashion to increasingly popular app offerings from Whoop and Oura, according to Macrumors.
Additional health features may include hypertension notifications. 9to5mac reports that the FDA has already reviewed an upgrade for these notifications, which are expected to debut next week.
The Return of the Ceramic Case
For the first time since the 2019 Series 5, Apple is expected to offer a ceramic case option. Bloomberg reports that Apple has tested two specific configurations: white and dark gray. This high-end material was previously offered for the highest-end Apple Watch Series 3 in 2017.
While the exact pricing for the new ceramic model is unconfirmed, the last ceramic offering 9to5mac, a price point significantly higher than current Ultra models.
Design Stability and Long-Term Roadmap
Despite the internal upgrades, the physical footprint of the watch is staying the same. Mark Gurman indicated that he does not expect major design changes for either the Series 12 or Ultra 4 compared to their predecessors. This contradicts some rumors regarding Touch ID integration or health sensors embedded in the watch band, which Gurman did not mention.
A more radical shift is coming, but not immediately. Gurman describes a “big redesigncurrently in development, though it is unlikely to arrive for another year or two. He compared the scale of this future evolution to the
revolutionary design change” associated with the foldable iPhone.
Apple’s long-term health roadmap also includes a high-complexity goal: blood sugar detection. According to Macrumors, Apple continues to develop this feature with a goal of releasing it by 2030.
Lineup Comparison: Series 12 vs. Ultra 4
While the Series 12 focuses on AI and continuous health data, the Ultra 4 remains the target for extreme users. The current Ultra 3 already offers satellite communications and a 42-hour battery life. For the Ultra 4, the primary demand from the community remains power efficiency.
The tension for the Ultra line remains the balance between size and power.
An Apple Watch SE 4 is not expected to launch this year. The current SE 3, released in September 2025, introduced wrist temperature sensing and an Always-On display.
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