Want to Lock Down Your iPhone? Here Are the Settings to Change

"Next is advertising. Apple Advertising is more focused on privacy than other platforms, blocking ads from tracking you across websites and services. You can turn off the Personalized Ads toggle. You'll still get ads, but they'll be generic. If you turn on Apple Advertising, you can tap into the Ad Targeting Information screen to see what data is shared, such as your birth year, zip code, and the categories for apps you have downloaded."

"In the Privacy & Security menu, near the bottom, you'll see the App Privacy Report and Apple Intelligence Report. For the former, you'll see the domains the app contacts each time you use it, as well as a layout of how many domains an app contacts. For Apple Intelligence, you'll see private compute requests and what data was shared with the request."

Apple Advertising limits cross-site ad tracking and offers a Personalized Ads toggle; turning it off yields generic ads. Enabling Apple Advertising reveals an Ad Targeting Information screen that lists shared data such as birth year, zip code, and categories of downloaded apps. The iPhone includes App Privacy Report and Apple Intelligence Report in Privacy & Security, showing contacted domains, domain counts, private compute requests, and shared data; the Intelligence report exports as JSON. Notes sync to iCloud by default, but enabling an On My iPhone account keeps notes local and non-synced. An optional password can encrypt sensitive notes, but local-only notes are unavailable on other devices and may be lost without backups.

Read at WIRED