Answer: Reminders alert you to upcoming calendar items such as appointments and meetings. By default, reminders occur 15 minutes before the start of these calendar items.
The native Reminders app on the iPhone and iPad are not only simple to use, it'll automatically sync your content between any iOS device and Mac you own. Along with the ability to set up your own reminder lists, you can also choose a default one. ... Tap on the Reminders section. Now tap on Default list.