Fullscreen Notificaiton (#1/2)
I recommend starting this before learning the "Alarm & Reminder" App.
Because this includes the basic function for "Exact Alarm" and "Fullscreen
notification".
Particularly when the Android is updated up to 14, it is permitted to use
"Fullscreen notification "
Alarm notification
Fullscreen notification and unlock screen
Exact Alarm by setting the Alarm clock