Easy to use. Flexible. I use the sub list feature to describe steps needed to accomplish a task. I have lists for every day of the week. Some tasks need to be done each day, e.g. wash dishes, etc. Some tasks are unique and I create them as needed. For each day I have 'to do' and 'done' sections. Once a task is completed it goes to the done section. This app helps me focus on getting things done and has become an essential part of my daily routine.