Data is processed on the user’s device where possible, for example, in creating predictive traffic routing which displays estimated travel time on a device’...

https://www.apple.com/jp/privacy/docs/Location_Services_White_Paper_Nov_2019.pdf

on iPhone or directly on Apple Watch. To the right are examples of what a user might see.  To learn more about Sleep, visit support.apple.com/en-us/ HT21168...

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