What is the difference between a Reminder and a Pre-correction alarm?
Both reminders and pre-correction alarms take advantage of your device’s built in notification systems. The difference between the two functions is all in the schedule.
Reminders go off every few minutes to remind you to do something. You can turn them on and off whenever you want. Pre-correction alarms are things you schedule to happen at specific times. You can set them to happen once a day or throughout the day in a recurring way.