As the author of this software, I would like to respond to the prior post. I wrote this program because I wanted a to do list that supported recurring to dos, and couldn't find one. Two Due allows you to specify an optional recurrence frequency for a to do item. Then, when you have completed the item for one cycle, you can automatically reschedule it for the next occurrence, so you are reminded to do it again. I set Two Due up to launch automatically when my Mac starts up, so it is always there when I need it. By the way, many other features are planned for future releases, and I am actively seeking enhancement requests from registered users. These enhancements will all be free to registered users.