Dagens Nyheter's etiquette expert Magdalena Ribbing and wine connoisseur Bengt-Göran Kronstam are two popular columnists who've each gotten their own iPhone apps. Björn Hedensjö, manager for DN.se, explains.

Photo: Paul Hansen
When and how did you come up with the idea for the two new Dagens Nyheter apps and how did you develop them?
When I started at DN.se in November 2009, I checked out what databases would be appropriate for packaging in an app format, since databases quickly and relatively inexpensively can form the basis of apps. Etiquette expert Madeleine Ribbing's question and answer archive and Bengt-Göran Kronstam's wine database were two good examples.