In the Reminders app, you can easily make to-do lists for things like grocery shopping, tasks around the house, and projects at work. When you add an item to a list, you can attach images; set flags; get alerts based on time, date, and location; and more.
Get an early reminder before the scheduled date and time: Tap , turn on When Messaging, then choose someone from your contacts list. The reminder appears the next time you chat with that person in Messages.
Flag an important item: Tap .