The new Apple Watch Series 12 and Ultra 4 introduce privacy concerns with features like Live Rewind and Siri Recap, which capture and transcribe audio without storing it, raising potential misuse of user data. Unlike previous updates, these features are more invasive, capturing and transcribing conversations all day, making it hard to explain to users that the watch is not actually recording continuously.

The Secure Exclave chip and machine learning algorithms enable real-time audio recognition and transcription, but Live Rewind and Siri Recap capture data without storing it, using encryption and Secure Exclave to protect privacy. However, this still raises concerns about constant listening and public perception, especially given Apple's focus on AI and fitness trackers.

Siri Recap uses ambient listening to take high-level notes of your conversations all day, while Live Rewind lets you double-tap at any point on the Watch's digital crown to see a transcript of the last 15 seconds, raising privacy concerns about constant audio capture and transcription.

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