Orgzly app
Orgzly stores notebooks in plain-text and keeps them where you choose to.* Create, edit and delete notes and tasks
* Collapse and expand sub-notes
* Schedule tasks and set their deadlines
* Set priorities and tags for notes
* Fling notes left or right to open quick-menus
* Search notes by various properties
* Create and save searches for quick access
* Synchronize notebooks with one or more directories
Notebooks are saved in Org mode's file format. "Org mode is for keeping notes,
maintaining TODO lists, planning projects, and authoring documents with a fast
and effective plain-text system." See https://orgmode.org/ for more information.