AS the 25 billionth app was downloaded from the iTunes store last week, it was a celebration of both the indie app developer and the individual curation of content. In Singapore, however, apps are increasingly falling under the domain of Big Business.While quirky free apps continue to be launched, the money here is flowing in two opposite directions: towards hard commerce in which people spend money through the app, and enterprise apps which are meant as tools for internal company use. App developers such as Buuuk have seen enterprise app work for clients go from virtually non-existent to serious money in recent times. 'About one-third of what we're doing is enterprise apps and the remaining two-thirds are consumer apps. The enterprise part started about 18 months ago and prior to that, almost all of the focus was on consumer,' said Jon Petersen, Buuuk's co-founder. Enterprise apps can be downloaded to an employee's smartphone from a specialised download site ins...