Apple launched the Apple Watch Series 12 and Apple Watch Ultra 4 yesterday, both available for pre-order. New findings reveal a significant, unannounced upgrade: both models now feature 4GB of RAM, double the 2GB found in the Apple Watch Ultra 3 and Series 11. This memory boost was uncovered through Xcode 27, as Apple does not typically publish memory specs for its Watch lineup.

The increase coincides with the introduction of the new S11 chip, which delivers the first meaningful performance improvement on Apple Watch in years and enables upcoming AI features in watchOS 27. While Apple highlighted the S11 chip and enhanced health tracking, the RAM doubling was not mentioned in its official announcement. Developers can use this information to optimize apps for the new hardware.

The surprise upgrade positions the Series 12 and Ultra 4 for stronger multitasking and future software demands, marking a quiet but impactful advancement in Apple’s wearable lineup.