Digital Crown

The Digital Crown lets users scroll content without obstructing their view of that content, but you can also use Digital Crown input to create sophisticated custom interfaces. Apps access the Digital Crown directly or through pickers. With direct access, your app receives the raw rotational data and it is up to you to decide how best to use that data. Use pickers to display a navigable list of items and handle the selection of an item from that list.

Provide visual feedback in response to Digital Crown interactions. Pickers provide feedback by changing the currently displayed value. When tracking rotations directly, use the rotational data you receive to update your interface programmatically. If your app does not provide feedback, the user will assume that rotating the Digital Crown has no effect.

Update your interface at an appropriate rate. Rotations of the Digital Crown should give the user precise control over changes to your interface. Consider using the rotational velocity to determine the speed at which you make changes. Avoid updating your content too quickly or too slowly if doing so makes it difficult to select values.