And it’s so cool. Point your phone at a boring old subway map and everything starts moving .
Here's how Tunnel Vision works: you download the app on your iPhone, and point the camera at a New York City subway map. Any old map — in the subway station, on your computer, a crumpled tourist map you bought in Times Square.
Once your phone recognizes the map, everything STARTS MOVING. For example, you can see how many people are entering and exiting each subway station right now (using turnstile data).
Or you can watch the trains move in real-time.
