At the June 2019 GTD Summit, David Allen briefly shared a vision of the “ultimate GTD app,” which consists of 19 pages of hand-drawn drafts of the screens he would want to use. To expand on that topic, we recorded David talking with Eric Mack and John Forrister about the past, present, and future of GTD software. It's a wide-ranging discussion with stories that will inform, entertain, and maybe even surprise you. This episode is part one of two.