Estimating Sleep Stages from Apple Watch Estimating Sleep Stages from Apple Watch September 2023 Overview Apple Watch users can track their sleep with Apple...

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

these privacy protections. Safari minimizes the amount of data collected by Apple and shared with third parties. Where possible, Safari’s privacy protection...

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