For emoji, Apple uses a privacy budget with epsilon of 4, and submits one donation per day. For QuickType, Apple uses a privacy budget with epsilon of 8, an...

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

Secure payments on the web 8 ............................................................................... Sync and sign-in features that keep the user in...

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