How to write a reminder app that gives an alarm at the appointed time even when the program is closed. in .net MAUI

Question

I want to create a reminder mobile application in .net MAUI that will run an alarm at a specified time even when the program is closed, and display a screen that has a button to disable the alarm.

Answer 1

varies by O/S

in IOS you schedule a notification:

https://developer.apple.com/documentation/usernotifications/scheduling_a_notification_locally_from_your_app

in android you use alarm manager:

https://developer.android.com/training/scheduling/alarms