The app works very well. But in the end I've decided it doesn't match my workflow well. I've used for a long time a simple text file to manage tasks  similar to markdown; the advantage is that I can create (long) notes in the same place  that I can create subtasks with arbitrary levels and that I can move tasks around between multiple sections: tasks to do today  tasks to do soon  long term tasks and completed tasks. I can also render that in a smaller font with compact lines to see more content.
October 17 2016