Please try the timer app that allows you to select the notification method.
Alarm: Notify with alarm sound
Light: Light turns on to notify
Vibration: The terminal vibrates and notifies

Usage is simple.

1. Set the timer value
2. Set the notification method
Settings can be changed with the alarm / light / vibration icon buttons
For alarms, the volume can be set from 0 to 15 levels.

3. Press the start button to start the countdown
4. When the time is up, you will be notified by the set notification method.