On the App Store, apps come from known developers who have agreed to follow our guidelines, and are securely distributed to users free from interference fro...

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

or more trackers from different companies on a single page. 
 Safari Privacy Overview | November 2019 3 Key Safari Privacy Features Intelligent Tracking Pre...

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