Citymapper has announced a $10m Series A funding round led by Balderton Capital.

Index Ventures, Connect Ventures and Greylock Partners and a number of unnamed angels also took part in the round.

03-uk-4inchCitymapper has been a godsend for Londoners by helping commuters get around the capital.

The free app calculates routes through Transport for London’s real-time API and combines it with location data from Foursquare.

Founder Azmat Yusuf also featured in our Tech City Top 25 as part of our first print magazine.

International expansion

The app already covers the cosmopolitan cities of London, Paris, Berlin and New York and has topped download charts despite spending nothing on marketing.

With this new investment, Citymapper is expected to expand to new cities in 2014.

Bernard Liautaud of Balderton Capital hinted at future developments for the app. In a statement he said:

We also see a major opportunity in crowdsourcing data to provide real time information on disruptions and journey times, for which the company already receives a stack of feedback from its users every day

This could be a similar move to the traffic community app Waze, which was sold to Google for $1.1 billion last year.