Design Apple System Experiences with HIG

Apple HIG: System Experiences helps choose and design app experiences on Apple system surfaces outside the main application. It covers widgets, Live Activities, notifications, watch complications, Home Screen quick actions, tvOS Top Shelf, App Clips, and App Shortcuts. The central design goal is immediate, glanceable value: show the most useful information for the surface and the user's brief moment of attention.

Each surface has a distinct role. Widgets provide a relevant subset of app information with thoughtful layouts for different sizes and deep links to the appropriate content. Live Activities track events with a clear start and finish, such as deliveries, timers, rides, or scores, across supported Dynamic Island and Lock Screen presentations. They need timely updates and an explicit end state rather than indefinite stale content.

Use it when information or common actions should be available without opening the full app. First establish the target platform and OS version, what content matters outside the app, how often the data changes, and the primary glanceable need. Existing project context can guide the work without requiring a global configuration file.

The imported references are snapshots with local corrections, not Apple endorsement or proof of current SDK availability. Confirm the actual SDK and platform behavior. Widgets use budgeted timelines, while Live Activities depend on ActivityKit and system or APNs delivery limits. Neither supplies guaranteed real-time monitoring. Show stale and offline states, and keep critical information available within the app.

Inputs are the platform, content, update behavior, user task, and applicable privacy constraints. The output recommends a system surface, content priorities and omissions, refresh behavior within system budgets, size or family variants, and deep-link destinations. A delivery-tracking design, for example, should account for timestamps, accessible labels, privacy-safe Lock Screen content, update and dismissal handling, and a device test matrix.

Notifications should be actionable and understandable on their own, with relevant grouping and threading. Promotional messages require explicit opt-in and current-rule compliance; installation alone is not consent. Home Screen quick actions focus on three or four common tasks with short titles and relevant SF Symbols. Top Shelf highlights suitable tvOS content, while App Clips keep an immediate task within their size constraints before offering full installation.

Modern watch complications use WidgetKit; legacy ClockKit layouts do not transfer one-to-one. Complications need focused content, multiple families, and careful update budgets. Watch-face sharing configures supported existing faces rather than enabling arbitrary third-party face rendering.

App Shortcuts expose frequent actions through Siri and Spotlight. Phrase restrictions differ from the parameters an underlying App Intent accepts. Related guidance covers status indicators, Digital Crown interaction, HealthKit, and NFC. Use synthetic preview data and redact sensitive content on shared or visible system surfaces. Intent and deep-link handlers must revalidate authentication and authorization: a tap or launch URL does not authorize purchases, account changes, or disclosure. Notification sending, App Clip publication, and backend deployment require their own task scope.