Apple Watch Ultra 4 Features | What watchOS 27 Reveals

Anticipated Hardware Upgrades for Apple Watch

Apple prepares to debut the Apple Watch Ultra 4 and Series 12 tomorrow. Code discovered within watchOS 27 indicates these new models are set to include significant internal changes alongside the software updates. The most notable technical adjustment is the addition of 128GB of internal storage. This is a substantial jump in capacity for a wearable device, allowing for more offline media and data storage directly on the watch.

Hardware sensors are also receiving an update. Reports confirm that the new Watch models will feature an entirely new optical sensing system. While Apple has kept details quiet, this move lines up with recent industry speculation that the company intends to track physiological metrics with higher precision. This sensing array likely supports the new health tracking capabilities embedded within the upcoming software.

Software Improvements and the Readiness App

Code analysis shows a new Readiness app is coming to the watchOS 27 interface. Its placement in the launcher—situated directly after the Workout app—signals that it will be a primary tool for users. This functionality mirrors established habits in third-party wearables like the Oura Ring. Users can expect to track their recovery and physical strain levels to better understand their daily activity requirements.

Strength training is getting a major overhaul inside the existing Workout application. The code reveals granular data tracking that goes beyond simple time and heart rate monitoring. The watch will now record repetition counts, specific equipment used, body side, and the duration of individual sets. This data collection turns the Apple Watch into a dedicated tool for weightlifting and resistance training enthusiasts who previously looked for third-party solutions to manage their gym routines.

The Broader Impact on Apple Wearables

These leaks suggest that Apple is pushing deeper into professional health and fitness tracking. By integrating advanced strength training and readiness metrics directly into the core operating system, Apple is making these features standard rather than optional. The goal is clear. The company wants the Apple Watch to be the primary device for serious athletes, not just casual trackers.

Still, the distribution of these features remains a point of interest. While the sensor-based updates will likely be exclusive to the new Ultra 4 and Series 12 hardware, software-driven tools like the Readiness app might appear on older, supported models. Users with existing watches are waiting to see which parts of watchOS 27 will reach their wrists. The coming days will provide the final details as the devices officially hit the market.