Must have app for visitors to London.
This app gives you great peace of mind. You can make quick notes of your Tube journeys for each days visit on a piece of paper from the information on this app or read it straight from the screen. Once you have "played" with the app for a few days the London tube system becomes much clearer and it gives you confidence to venture into it. Dont forget to get your Oyster prepaid travel card which will get you through the barriers,saves time and money buying tickets. Enjoy this app.