In iOS 13, Reminders lets you group related lists of reminders on the iPhone. When you create a group in Reminders, you can bring together related lists under one folder. This tip will help you set up groups and get your reminders organized. You can even use this method to add groups in Reminders on your iPad! Read on to learn how to use the updated iOS 13 Reminders app to set up groups of lists on the iPhone.