Google own 3 of the 5 most-accessed mobile apps in the UK

"In April 2011, 40 per cent of the 21.8 million UK mobile internet users accessed a connected application*. Google Maps ranked as the top mobile app with 6.4 million users, reaching 73.3 per cent of all UK app users. Yahoo’s Weather app ranked second with 3.6 million followed by Facebook’s app with 3.5 million unique visitors. Another two apps published by Google - Google Mobile and YouTube - rounded out the top five, highlighting Google’s strong position among UK mobile consumers."
Source:  Data from the GSMA Mobile Media Metrics Report, reported in a press release from comScore, 22nd June 2011