You can repeat a reminder every N days, weeks, months or years. The minimum recurrence is every 1 day. There is no every N minutes/hours recurrences.
The following kinds of recurrences are also supported in Due:
- Weekdays only
- Weekends only
- On certain days of the week only (e.g. Mon, Wed, Fri)
- 1st/2nd/3rd/4th/last Monday-Sunday every N months
- 1st/last day/weekday every N months
You can also set reminders to repeat-from-completion.