Barclays' Pingit app has been downloaded 1.2 million times

"The app, which is also available to customers who do not bank at Barclays, allows people to send and receive money via their mobiles using just mobile phone numbers. Users can also send money almost instantly to companies or charities and internationally, for free.
It has attracted 1.2 million downloads since its launch in February. A large amount of these are non-customers, who have then gone on to take up other banking products from the company, Barclays’ customer experience design director Darren Foulds claims."

Source:  Marketing Week, 28th September 2012