If you're planning on visiting London and you want to get a good idea of what its public transportation is like, London Bus is the perfect app for you. In it, you'll find practical information on everything you need to know before you take your trip to London: what kind of card you have to buy to get cheaper rides, what routes to take, how much each ride costs, an Underground and bus map, what lines are currently running, how long you'll have to wait, and much more.
The way the app works is pretty simple. It also includes information from London Underground´s website so it's even more comprehensive. This way, you can look up all the information you need from the comfort of your smartphone and plan routes in advance so you don't get lost in the big city.