https://arstechnica.com/gadgets/2019/02/microsoft-taking-hololens-like-augmented-reality-apps-to-ios-android/

With HoloLens 2's big reveal just around the corner, Microsoft has broadened its augmented-reality (AR) ambitions with new apps for Android and iOS.

Remote Assist is an app designed for service engineers operating in the field, letting them show what they can see to a remote expert, who can then use a mixture of voice and AR drawing and annotation on what they see to provide guidance, troubleshooting, and instruction. This feature is already available for HoloLens and is being used by real service engineers. A preview of Remote Assist is coming to Android; while it won't offer the same hands-free convenience as the HoloLens, it also won't require the $5,000 headsets, instead running on a smartphone.