An interactive model of Prague's 600-years old Astronomical Clock - Orloj

The App starts by displaying the local time that has been set on your iPhone

Change Orloj time by tapping the screen; default time step is an hour; swipe right and the Orloj will start moving; swipe left and it will stop.

You can also change the time step - from hours to minutes, days, months or years; the current time component/button is highlighted:

Shake the iPhone for time reset to the current time.

Use ‘Calendar” screen to select a new date

There are two 'Saint-du-Jour' names: one is from the modern Czech calendar, and the other is the one painted on the Orloj's calendar wheel.

‘What is What‘ screen will give you a basic orientation where Orloj's major parts are located. By scrolling and zooming (use swipe and pinch gestures) you can explore the Orloj's details.

‘ Astro‘ screen displays historical depictions of the signs of the zodiac for the given date.

‘About‘ screen will refer you to a supporting web site at praguealacarte.com for more help.