New research suggests the global appetite for mobile applications will explode over the next two years.<br/><br/>A study done for Getjar, the world's second biggest app store, said the market will grow to 17.5 billion dollars in the next two years. <br/><br/>The study claimed downloads would climb from 7 billion last year to 50 billion by 2012 – a 92 per cent year-on-year increase. It found there had been a gold rush with the number of app stores rising from four before 2008 to 48 today. The study also suggests Apple's domination of the market could be challenged. <br/><br/>While Apple's App Store is regarded as the dominant player, there are many more to choose from including those from BlackBerry, Microsoft, Google, Nokia, and Samsung.<br/>