The Timer app is a countdown timer you can use to time the duration of an operation or function.
On the Home screen, tap the Timer app.
The design of the app and the controls may differ depending on your settings and software version. If you have deleted the app from the Home screen, tap Apps and then tap the app to add it back to the Home screen.
If 5 minutes pass and you haven’t tapped OK or opened the door, the message is added to the notification.
To delete a timer, tap on the right side, and then tap Delete in the dialog box.