oDoT is the ToDo, but conversely. Write down tasks after you have completed it. At the end of the day, there will be no uncompleted tasks.
The idea behind the reversed ToDo list is to focus on what you have done. Do more each day. Increase the total number of tasks.
Use Inbox for incoming tasks. It will help you not to forget important tasks. Complete tasks in the Inbox — it will be moved to oDoT list.
My app is on the seed stage. Feel free to suggest improvements. It will help us all do more.