hig-components-system

Apple HIG: System Experiences

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Key Principles

General

1. Glanceable, immediate value. System experiences bring your app's most important content to surfaces the user sees without launching your app. Design for seconds of attention.

1. Respect platform context. A Lock Screen widget has different constraints than a Home Screen widget. A complication is far smaller than a top shelf item.

Widgets

1. Show relevant information, not everything. Display the most useful subset, updated appropriately.

1. Support multiple sizes with distinct layouts. Each size should be a thoughtful design, not a scaled version of another.

1. Deep-link on tap. Take users to the relevant content, not the app's root screen.

Live Activities

1. Track events with a clear start and end. Deliveries, scores, timers, rides. Design for both Dynamic Island and Lock Screen.

1. Stay updated and timely. Stale data undermines trust. End promptly when the event concludes.

Notifications

1. Respect user attention. Only send notifications for information users genuinely care about. No promotional or low-value notifications.

1. Actionable and self-contained. Include enough context to understand and act without openin