Horologium Romanum 4+

The Roman Clock

Stephen Taylor

Designed for iPad

    • 4.2 • 5 Ratings
    • $1.99



Shows the time in Roman numerals (VIII:IX), and the date as, for instance, “Ante Diem Kal. XII Ivlivs” for 12 days before the Kalends of July.

The day, the date, the proverb of the day, and the help text can all be in either English or Latin. You’ll use Latin of course – I’ve just provided the English text for other people who are less erudite than you.

For those who seriously want to be Roman, the time can optionally be measured Roman style – still a twenty four hour day, but with the twelve hours of day measured from sunrise to sunset, and the twelve hours of night measured from sunset to sunrise. This way of measuring time has three notable properties;

- hours and minutes will be a slightly different length each day, as the seasons pass and the days get shorter or longer.
- hours and minutes will be a slightly different length at different latitudes, even on the same day. This is why the app asks you to let it use your location when you’re using Roman style time – it needs it to work out the sunrise and sunset times.
- you will never be on time for an appointment again

As the help text says:
“Sequens programmatiunculum ad Horologium Romanum pertinens conscripsi ut peregrinatoribus qui ab Imperio Romano ad haec tempora iter faciunt auxilio sit. Immo vero etiam aliis lectoribus forsitan utile esse possit.”

That is to say – “Horologium Romanum – The Roman Clock app – was written as an aid to time travellers from the Roman Empire who have chosen to visit the 21st century. Even if you do not fall into that group you may still find it useful.”

What’s New

Version 1.2

Minor bug fixes.

Ratings and Reviews

4.2 out of 5
5 Ratings

5 Ratings

humanclock ,

Creative way to show time

This is a fun way of displaying time. I have found that the app is good way to force myself to practice Roman Numerals if I want to know the current time.

There are also some nice little additions to the clock that have made me learn a few new things, such as what the word "Kalends" means (the first day of the month on the ancient Roman Calendar)

Showed it to a friend who is trying to teach Roman Numerals to her daughter and she was pretty excited by this.

Cabbages Yum! ,

This is a fun clock!

It’s cool and works great

Paige Markham ,

Very Disappointing and Expensive

UPDATE: After viewing a while, the Roman clock is totally whacked. There appears to be no rhyme or reason to the time displayed.
ORIGINAL: This seems to be based on the civil clock. I was really hoping the 12-hour option would have the hōra prīma stating at daybreak and nox beginning at sunset. Not that I know all that much about it, per se, but enough to be disappointed. The calendar dates seem, so far, to be spot on, but I could have figured that out myself. The clock is the harder part. This is not worth the price at all. NOTE: It’s also unsupported.

App Privacy

The developer, Stephen Taylor, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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