Cell phone users are often on the move and this explains the large number of applications geared towards helping travellers wherever they go. One of the most successful travel programs available for handheld computers is this free guide to the subway systems in over 300 cities worldwide.

Métro has a very basic interface which can be a little tricky to read if you haven’t read the user guide. Once used to the controls, though, the average user will have no further trouble with this program. Use it to plan journeys, guide you between subway and railway stations, or to help you find places of interest such as museums in the city.

With frequent updates meaning you don’t need to worry about out-of-date information, Métro provides an impressive degree of information for a small application.