Immersive Reader is an awesome service from Microsoft that makes text easier to read. But since the service is only in preview, it's only available to websites. This control changes that. It allows modern Windows developers to integrate the Immersive Reader into their UWP applications with one line of XAML.
A PR is open to add this to the immersive reader SDK. Fingers crossed that it gets completed soon! https://github.com/microsoft/immersive-reader-sdk/pull/164