GTD is only a productivity system, you can choose between several ones. Also, there are a lot of productivity porn (apps, BuJos, YouTube gurus) and so on. The

GTD is only a productivity system, you can choose between several ones. Also, there are a lot of productivity porn (apps, BuJos, YouTube gurus) and so on. The thing is that you need to understand what you can and cannot do with your time, and either you embrace it or you change it. Productivity apps work for me on a personal level (habit tracking, personal projects, recurring chores...). But for work it's much more complicated so I have stopped trying to shoehorn my schedule/non-predictable todos into an app (it's just Google Calendar).