Waymap is a revolutionary navigation app that works underground and in crowds, when conventional services are notoriously unreliable. It was borne out the frustration of Tom Pey, who lost his sight after falling from a roof. “We saw that there was a problem for blind people, which actually mirrored a similar problem for everybody. Google Maps and its equivalents only work outdoors for some people, some of the time, and work indoors for no one.”