Missed alerts usually trace to an absent reminder option, a past trigger time, denied system authorization, or notification presentation settings.

Checks to make

  1. Open the reminder and verify its target date and alert choices.
  2. Confirm the alert time is still in the future.
  3. Allow diReminder notifications in iOS Settings.
  4. Check Focus, Scheduled Summary, sound, and preview settings.
  5. Confirm automatic device date, time, and time zone.
  6. Save the reminder again and test with a near-future item.

What the result tells you

  • Low Power Mode does not normally cancel scheduled local notifications, but presentation remains controlled by iOS.
  • Force-quitting the app is not a reliable notification fix.

Before trying again

  • Record the exact expected trigger time when contacting support.
  • Do not create many duplicates while testing.