It's not that I'd forget my head if it weren't attached, but I must admit I do lose umbrellas more often than anything else. In any case, Todoist is not about prevention of lost items, but it deals with a problem that most of us have. A busy schedule.
Todoist allows you to record tasks under projects, which are basically categories like shopping or errands, as well as giving them priorities. This can help you decide what to do first.
Tasks can be grouped under parent tasks and checking the parent automatically checks all under it. This can be done easily when creating a task by sliding a small handle to the right or left in order to position the task just like in a folder tree. You can change that later by editing it.
Todoist also links you to an online profile where you will gain ranks by completing tasks. This can motivate you I guess, but your profile is updated only while you're online, which combined with the requirement of creating an account or linking to one, makes me wonder whether this app is nothing more than an information leak on the user's part. Of course this connectivity allows cross-platform usability which is generally the excuse.
The paid version offers more features such as labels, that help you categorize tasks to an even further degree.
- Project categorization
- Priority setting
- Hierarchical task structure
- Gamified profile
The priorities and parent/child relations between tasks help with complex tasks list.
Editing is a bit fiddly, the buttons being small and tucked to the bottom of the screen.
Todoist is not only preferable if you'd rather not write/type your to-do list on a memo note, but also for cases in which simply checking a task is not enough.