with org-mode (an emacs mode for organizing lists) you can make lists with bullets: * TODO sublevel 1 * sublevel 2 and prioritize them with [A], [B] etc, tag them with :tag1:, :tag2: etc, and time, schedule etc them with :CLOCK:, :SCHEDULE: etc.

I am using Drafts to edit create org files in dropbox. Your swipe feature is handy in this regard so I can more easily integrate org-mode with my mobile workflow. There is an mobile-org app but it's a bit dated, and apps like Clear with similar swiping of tasks do not export with other services or files.