Terrible app for GTD… Avoid!
Don’t call your app a GTD app if it doesn’t even have the most basic GTD concepts built-in. There are no distinguished Next Actions / Someday lists unless you manually create them (and there are hundreds of list apps that can be manually configured for GTD use). The only elements of GTD that are there by default are an “Inbox” and a scheduled actions section. But, you can’t convert tasks to projects. You can’t add existing tasks to a project as a subtask. You can’t select multiple tasks for editing multiple tasks (i.e. deleting multiple tasks, etc.). I am requesting a refund from Apple immediately, as this app has misrepresented it’s usefulness.
InfluentialReviewer about Chaos Control™: GTD Task List