Contribute to Open Street Map easily with StreetComplete Android app

StreetComplete is a really fun app (well fun if you're a dork like me) for Android that "finds missing map data in your vicinity and displays it on a map as quests. Solve each quest by visiting the location on-site and answering a simple question to update the map. The info you enter is directly added to OpenStreetMap in your name, without the need to use another editor". How cool is that? OpenStreetMap gives us so much, it's nice to give a little back.