Tube Tracker (US$2.99) is the ideal companion for those traveling London's Tube (underground train service), the DLR (Docklands Light Rail) and the London Overground rail service.
I've lived in London for over 12 years. Almost everyday I use London's rail network in one form or another to get around the city. To this day, every now and again, I still get excited about using the network. I get overwhelmed by its sheer scale, size and the complexity of it. It's simply an incredible feat of engineering. According to the Transport for London website, there were 1.1 million passenger journeys on the Tube in the 2011 - 2012 period. There are stations and tunnels dozens of meters underground. It is incredible! However, there are days, more often than not, when I can't stand to be on the network. Unexpected delays, overcrowding and getting lost are very real problems train travelers face in London. That's where Tube Tracker comes in.
I've spent the last few days using Tube Tracker and I've found it to be one of the most comprehensive apps I've used to navigate the London Underground, DLR and London Overground. When you first open the app, you're presented with a list of stations from the nearest to the farthest from you. Tube Tracker uses your iPhone's GPS to indicate how far away you are from a station -- to the nearest meter -- as well as displaying a GPS compass next to each station to point you in the direction of that station.
The colors of the train lines that operate through each station are shown next to the name of each station, so from a glance you can easily see which station you need to get to in order to catch the train you're looking for. For example, if you need the Central Line, which is identified with red, simply scroll down until you see some red next to a station name.
As well as the station list being populated according to location, you can also set the list to either show recent stations visited or stations you've indicated as favorites because you've starred them.
When you tap on a station name, you're shown a map of the station as well as the platforms at the station. Tapping on the platforms shows you a list of trains due and how long it will be until they arrive.