BlindSquare is an app for blind and visually impaired to help them understand their surroundings. BlindSquare uses GPS and the compass to locate you. It then gathers information about the surrounding environment from FourSquare. BlindSquare has some unique algorithms to decide what information is the most relevant and then speaks it to you with high quality speech synthesis. “What's the most popular café within 200 meters radius? Where is the post office or the library?” BlindSquare is aware of when you travel by car, bus or train and starts to report interesting places in front of you (for example, the next stops) and street crossings when you are passing them.