https://www.cnet.com/news/microsoft-hololens-app-is-coming-to-android/

The apps are focused on businesses -- not consumers. "Mixed reality" is Microsoft's term for anything related to augmented reality or virtual reality.

The Remote Assist app for Microsoft's HoloLens headset already lets wearers share what they're seeing via the built-in camera. They can annotate images to give detailed instructions or troubleshoot a problem. With the Android app, people will be able to do basically the same thing with just their phone. That means businesses can take advantage of features, like annotation, without dishing out for a headset.