• Notifications were disabled for the app or silenced system-wide.
• Battery optimization or low-power modes deferred background work on some Android devices.
• The underlying timer or routine doesn’t apply to today (for example, wrong weekday on a weekly schedule).
• You’re using web only — reminders won’t fire as native pushes.

Open Today, Care, and Timers (if shown) to verify what should have triggered.

Note: As-needed Timers during illness are part of Care sessions on the Care tab—check there as well.