What's the difference between fixed and variable counters?
When you set up a Reminder, you have the option to set it up with a fixed interval or a variable interval. All of this means the notification will go off after exactly that amount of time, or about that amount of time. For example, let’s say you set a Reminder to go off every 30 minutes. With a fixed interval, the reminder goes off every 30 minutes on the dot. With a variable interval, the notification goes off every 30’ish minutes.