app. The initial sleep-tracking feature, released in 2020 (with iOS 14 and watchOS 7), included a determination of two states — asleep or awake — for each 3...

https://www.apple.com/jp/healthcare/docs/site/Estimating_Sleep_Stages_from_Apple_Watch_Sept_2023.pdf

Extensions that respect user privacy 10 ................................................................. Improving Safari while respecting privacy 11。

https://www.apple.com/jp/safari/docs/Safari_White_Paper_Nov_2019.pdf