Action button on iPhone and Apple Watch
Enable people to run your App Shortcuts with the Action button on iPhone or to start your app’s workout or dive sessions using the Action button on Apple Watch.
Overview
On supported iPhone models, people can choose a single App Shortcut to perform an app’s action when they press the Action button by selecting an App Shortcut in Settings > Action button. To give users quick access to your app’s functionality, create App Shortcuts for your high-value app intents using the init(intent:phrases:shortTitle:systemImageName:) or init(intent:phrases:shortTitle:systemImageName:parameterPresentation:) initializer. For additional information, see App Shortcuts.
On supported Apple Watch models, people can choose to start workout or dive session using the Action button in Settings > Action Button. To add your app to the list of available workout or dive apps, implement an App Intent that adopts the StartWorkoutIntent or StartDiveIntent protocol. For more information, see Responding to the Action button on Apple Watch Ultra.
For design guidance, see Human Interface Guidelines > App Shortcuts and Human Interface Guidelines > Action button.