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Prague Orloj

By Jiri Sklenar

This app is only available on the App Store for iOS devices.


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 for more help.

What's New in Version 2.1

Improved user interface; it is easier now to mail a message to a friend with a snapshot of current time as it would appear on the Orloj; several bug fixes.

iPhone Screenshots

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Customer Reviews


Can't stop playing with this. Great for the intellectual in your life! If this were a functional clock/alarm clock app, it would earn my fifth star.

Formerly great, now...

I’ve enjoyed this app for a few years, but unfortunately, it doesn’t work with the iPhone 6plus. It crashes every time it (tries to) start up, therefore it’s become totally unusable.

Only recommended for iPhone 5 or earlier models.


A fun application, but I'd hoped that the home screen icon would display the current time. Maybe in the next update?

Prague Orloj
View in iTunes
  • $1.99
  • Category: Travel
  • Updated:
  • Version: 2.1
  • Size: 9.0 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 4.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

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