Pigeon Post is a location-based messaging app for travel notes and memories. Crumbs, as the messages are called, must be picked up where senders have left them, be it a cafe around the corner, a shop overseas, or the North Pole. When you find someone elses crumb, you learn something new about the person and the place. When others find your crumbs, you learn what they think about them. Surprise and get surprised!