In his announcement (via The Hollywood Reporter), Burns noted it was exciting for him to be using an Apple platform for his app as the company has long used the "Ken Burns Effect", where a camera slowly pans over a still image, in its video editing apps.
While the app doesn't include the full Ken Burns' documentaries, it does house hand-selected scenes by Burns in playlists inspired by six themes: Race, War, Art, Hard Times, Innovation, and Politics. One theme, Innovation, is included free with download but the remaining five themes, which include over three hours of content, must be unlocked via a $9.99 in-app purchase."Apple has long used an element of my filmmaking in its programs, which they call the Ken Burns Effect. I'm so excited to now be using Apple's platforms to create a radically new way to present my work and reach new viewers. Our films are made in a small town in New Hampshire over many years, with images and stories woven together in a way that we hope brings experiences of the past into the present."
Article Link: Famed Documentarian Ken Burns Launches iPad App