TodoLister is a todo manager, it uses device calendar database.
Some info: the word "All" in toolbar is part of a path view, swipe it left or right to filter todos by collection, same applies for the AddTodoSheet.
If a todo has a note, it can be shown clicking on the todo. To delete a todo, press and hold on it. DualArrow icon in the header is used to pick sorting criteria. To create a todo, you must fill the title and pick a calendar.