Why did a reminder not arrive?

The usual reasons a reminder is quiet.

A reminder may be off in Routinely, blocked by iPhone permission, or paused by Vacation mode or protected sleep.

What to check

  1. Open Settings → Notifications and check the relevant reminder and notification permission.
  2. Check iPhone Settings for Routinely’s notification permission.
  3. Check Vacation mode in Settings and your protected sleep time. Some reminders wait until you wake instead of interrupting sleep.