You can set repeating rule to a task. When tasks that have repeat rule are completed, next task will be added automatically.
1. Setting Repeating Rule
Edit task to add repeating rule.
Select one of the 7 repeating rules. Here I select "Day(s) of Each Month" and select day in next screen.
go back to former screen and select origin.
2. Complete a Task That Have Repeating Rule
This Icon shows that the task has repeating rule.
When you complete the task, next task will be added.