I got this idea from playing a lot of Elden Ring. In the game you can leave messages on the ground for other players to see, so I thought it would be cool to build an app where you can do the same thing but in real life.
Imagine you walk around your neighborhood and on your phone you can see messages that other people have put down while standing in the exact same spot as you. Kinda cool, right?
I started trying to build an API for this one using Scala and was quickly overwhelmed by the complexity. It got too hard, and I stopped believing the idea could go anywhere, so I quit. RIP