The black cab has always been a talisman of salvation for business men and late night revellers alike, but locating one in the early hours or in the midst of a downpour can be a frustrating (not to mention damp) experience. The LDNtaxi App looks set to solve your travelling woes by utilising your iPhone’s GPS to view the nearest available cabs. After that it’s merely a case of setting your destination, hitting the ‘hail’ button, then waiting in comfort for your iPhone to announce your chariot’s arrival. The app sends you the registration number of the cab as well as the name and picture of the driver and thanks to a driver screening process, each taxi is fully licensed. If you fancy calling in your own personal set of wheels in style, then head on over to the App Store where you can pick up the app for the cheapest fare of all, free.