To-do apps typically have features such as reminders, due dates, and the ability to categorize tasks into different projects or categories. Some apps also allow users to collaborate with others, share tasks, and assign tasks to team members.

To use a to-do app, users can create a new task by typing in the task name, setting a due date, and adding any additional details or notes. They can then mark the task as complete once it's finished, or reschedule it if necessary.

To-do apps can be used for personal or professional purposes, and are especially useful for people who have a lot of tasks to manage or who need help staying organized. They can be accessed on desktop or mobile devices, making it easy to manage tasks on-the-go.