Jessica Lessin has a nice profile of Loren Brichter, creator of one of my favorite apps on iOS, Letterpress:

Mr. Brichter, whose design aesthetic is inspired by information theorists like Edward Tufte, a proponent of minimizing extraneous information in graphic designs, says he thinks up new features for apps based on how people move objects in the real world.

“Everything should come from somewhere and go somewhere,” he says, adding that he’s irked by apps that have menus that pop up or collapse on themselves because the interactions aren’t real. “The most important thing is obviousness. The problem is overdesign.”

Loren Brichter was the first developer to create the “pull to refresh” gesture in some of the iOS apps, particularly useful for Twitter.