While wearing HoloLens, other people in the room are normally unable to see what you see.
This is where SpectatorView comes in. The program allows others to see on a 2D screen what a HoloLens user sees in their 3D world. It’s a fast and low-cost approach to recording holograms in HD.
Here’s how you can use a mobile device to view and capture holograms from HoloLens: