Alarm Clock Pro 14.0 -

Click on any existing alarm in your list to modify its time, sound, or action, then hit Save again.

Use the built-in Stopwatch to record laps or the Timer for shorter countdowns. 3. Managing Your Alarms Alarm Clock Pro 14.0

Use the toggle switch next to an alarm's name to turn it off without deleting the settings. Click on any existing alarm in your list

If using a device with a screen, you can toggle auto-brightness or set the display to turn off completely at night. Alarm Clock Pro 14.0

Ensure your PC/Mac is not in a deep "Hibernate" mode that prevents the software from waking the system, unless "Wake from Sleep" is specifically supported and configured in your OS settings. Alarm Clock Pro Manual - Koingo Software