Use private Wi-Fi addresses on iPhone, iPad, iPod touch, and Apple Watch - Apple Support (CA)

To improve privacy, your device uses a different MAC address with each Wi-Fi network.

iPhone User Guide - Apple Support (CA)

New 'Private Address' iPhone feature could severely impact the Wi

iPhones have been exposing your unique MAC despite Apple's

Protect your web browsing with iCloud Private Relay on iPad

About privacy and Location Services in iOS, iPadOS, and watchOS

Choose iPad settings for travel - Apple Support

Make an emergency call or text on iPhone or Apple Watch - Apple

Get apps in the App Store on iPod touch - Apple Support (CA)

Get started with Screen Time on iPhone - Apple Support (CA)