The updated agreement spells out restrictions on how companion devices and accessories can receive, display, and store notification data forwarded from iPhones and iPads. Live Activities, the feature that provides real-time updates on lock screens and the Dynamic Island, are subject to similar constraints.

The move addresses a growing ecosystem of smartwatches, fitness trackers, and other accessories from third-party manufacturers that rely on notification forwarding to provide useful functionality. Until now, the rules around how these devices could handle that data were less explicit.

Apple has been steadily expanding its privacy framework across iOS, requiring apps to disclose data collection practices and limiting tracking capabilities. The notification rules represent an extension of that philosophy to the hardware accessory ecosystem.