Overall a great app but I do have some suggestions – Todoist: To-Do List & Planner Review

By far the best to do list app I have found, and I've tried many. Been using the app daily for over 1.5 years and love it. Some useful features would be: -a trash bin for deleted items -a way to change the notification sound to something other than the default iOS alert -"start date" functionality that allows a task show up under "today" and automatically "float" to the next day until the due date occurs. Only after the due date has passed should the task become "overdue" -ability to add filter shortcuts under the inbox/today/next 7 days shortcuts -ability to set projects to sort the list automatically by your choice of date or priority -another one or two levels of priorities... 4 levels is not enough to really help you drill down on a long list of tasks
Review by porschephile986 on Todoist: To-Do List & Planner.