Tube Map for iPhone is a fairly self-explanatory app - it is a maps of the London tube. The scrollable map does not require an internet connection so you can access it even when you are without signal.

While this is useful, the app does have more to offer. Tube Map can also provide information about potential problems on any of the lines so you can consider taking a different route.

To this end, Tube Map also includes a route planner than can be used to calculate the easiest way to get from A to B with the fewest changes. The route you need to take is clearly displayed on the map but you can also view changes as a list.

If London is unfamiliar territory, the app can also be used to quickly locate the nearest tube station. Whether you are a seasoned tube traveler or just visiting the capital, this is a wonderfully useful tool.

What's New in Version 5.5.4

NEW for Christmas! We've added a Tube Map of the North Pole to give the app a little festive magic! See how to get from Winter Wonderland to Santa’s Workshop using the Comet line and search the map for hidden elves and candy canes. There is also the chance to win £1,000 with an interactive competition! The Xmas tab is available on the map screen and all of the terms and conditions are available at www.mapway.com/blog.

Also new to this update is additional information in the route planner showing you alternative travel options. This new feature compares live travelling times and estimated prices of getting the bus or catching an Uber so you can find the best option for your journey.

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Tube Map takes the hard work out of travelling by tube - all completely free of charge.