Obligations that do not depend on somebody remembering them.
Tasks
A due date, a priority, subtasks, an assignee, and a distinction between "when I plan to do this" and "when it has to be done". Those are two different dates, and isna keeps them apart, because they are not the same thing.
Two kinds of repeat
Some tasks repeat on the calendar — rent on the first of the month. Others repeat from the moment they were finished — the air filter three months after you last changed it, not three months after it was due. isna does both.
Two layouts
A board by status or a plain list, both with drag to reorder.
Lists
Shopping, packing, anything. One tap to check off, and any list can be saved as a template — "packing for the coast" does not get written again every July.
What we left out on purpose
No points, no leaderboard, no comparison of who did more around the house. The task distribution chart exists in Insights, but it is off until you switch it on. Counting other people's chores turns into scoring people rather easily.
Start with the one deadline you cannot afford to miss.
Set your family up in two minutes. Thirty days of everything, and it does not ask for a card.