It’s all about the software. Apple CEO Tim Cook said on Tuesday the company would be offering iWork apps free with any new iOS device — specifically, iPhoto, iMovie, Pages, Numbers, Keynote. Normally, the package of iWork software would cost $79. Cook said iWork is now the best-selling suite of productivity apps on any platform, though as AllThingsD’s Ina Fried said, it’s unclear exactly how that is being measured against Microsoft Office.