I think someone made this with augmented reality. Don't remember name of app though, it was a few years ago. It let contributors have their own "streams" so at

I think someone made this with augmented reality. Don't remember name of app though, it was a few years ago. It let contributors have their own "streams" so at any given location you can focus on content by a certain user. Like following a tourist trail, or a scavenger hunt. That kinda solves the cluttered comments problem