> For the complete documentation index, see [llms.txt](https://docs.holokit.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.holokit.io/product/holokit-x/input-methods/apple-watch-optional.md).

# Apple Watch (Optional)

We use Apple Watch as Controller for HoloKit X.