HarmonyOS developers building for smartwatches now have a dedicated tool for circular displays. The ArkTS ArcList component arranges list items along an arc, creating a natural scrolling experience on round screens. This solves the unique challenge of fitting intuitive navigation onto a small, curved surface where traditional vertical lists feel awkward.

Developers can choose between static lists with `ForEach` or dynamic lists using `LazyForEach` and a custom data source. The component automatically centers and highlights the focused item, supporting rotational input and smooth gestures. This focus management is critical for wearable apps where screen space is minimal and user attention is fleeting.

Effective usage involves wrapping interactive items in a `Button` component and styling the focused state for clarity. While the visual output remains consistent between static and dynamic implementations, the latter adds flexibility for live updates. As smartwatch apps evolve beyond basic notifications, components like ArcList provide the foundation for richer, more interactive wrist-worn interfaces.