Ἀθωνική Ὥρα

You can install it on an (old) device that you do not use, choose in the settings (of the device) that the screen will never turn off, then open the Athonian time, and thus have a beautiful wall clock that will ring every hour a bell, as many times as the hours.

Also, every 5 or 10 minutes birds fly.

On the screen you see a night photo with the moon for as many hours (depending on the month) as it is night.

Click on the cross (top right) to open the menu. There, in the settings, you can enable the chirps, disable the bells and choose a 24-hour or 12-hour time mode. the option you see is the one that will be activated when you select it. E.g. if the button says 24-hour time, when you press it it will activate and the button will change and the 12-hour icon will appear.