St. Nicholas - devil sounds

Schedule and play the devil's sound to let the children know that the
Saint Nicholas, the devil and the angel are coming.

Select the kind of sound and the number of repeats, set the timer for when you want the hear the sound, and put the phone down where you want it to sound.

You can easily and discreetly check the remaining time in the notification without having to open the app and risk your kids seeing it.

Recent changes:
- custom sound selection
- maintenance & bugfixes