Lock down was a great time to experiment. I imagined a world where digital information about physical spaces was easy to make and share. What came out was Anchor. By just waving your phone around you can detect surfaces, tap to add notes, phots videos and links.
I started by real world prototyping, walking around my house with post-it notes adding any critical information about the space. When I saw enough value in that I made a prototype in Unity. After about a month of testing from that I was building the real thing.