FairChores, as the name says, assigns tasks to given helpers impartially and fair, so that everybody has the same amount of work to contribute.
Add all to-dos, add the helpers and see what everybody has to do during this week. Share the lists with them with just one click. Organizing a shared-flat/household has never been easier.
The tasks get reassigned every Sunday. You cannot change this day as to keep the fairness as much as possible.
The lists are updated every time you change the tasks, but will stay the same if you just add and then re add it.
If you want to add new tasks for the next week just share the list before you add them, and on the next Sunday you can hit that "copy lists" button again, and paste it in your favorite messenger/e-mail app to tell all helpers what they have to do this week.