DozClock
Utilities
Free
The dozenal number base (base twelve) has long been known to be superior to decimal (base ten). Here are a clock and calendar demonstrating that at every time of day!
The Dozenal Suite is a set of six apps of dozenal utilities. They run on Apple’s mobiles (with iOS 18 or higher).
On any timing device, the day is divided by successive powers of 12, providing metric time reckoning based on twelves rather than tens. The leftmost digit changes every 2 hours (1/12 day), the next digit every 10 minutes, the next every 50 seconds. If displayed, the fourth digit changes every 4 1/6 seconds and the fifth digit every 25/72 second. That's much simpler and easier than the current time reckoning, which uses a mixture of bases 10, 12, 2, and 60.
In the dozenal number base, because the number 10 is one dozen, numerals ten and eleven must be single digits. They are represented by the symbols invented long ago by Isaac Pitman: rotated 2 for ten, and rotated 3 for eleven. Those are used by the two major dozenal societies, the Dozenal Society of America and the Dozenal Society of Great Britain. In plain text with dozenal numbers, ten is designated by the letter A, and eleven by the letter B.
On either or both of the lock screen and home screen, the DozClock widget displays diurnal time. In the app you choose to start the clock at local midnight or at 6 AM, and for the home screen, to display either three or four digits. The calendar displays the date format yyyy-mm-dd. In the app you choose the traditional calendar or the Holocene.
If you start the clock at 6 AM, the times between midnight and 5:59:59 AM are a different color, as a reminder that traditional time reckoning has started a new date.
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A second Holocene calendar has been added.
The developer, Paul Rapoport, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
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Information
- Seller
- Paul Rapoport
- Size
- 1.1 MB
- Category
- Utilities
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Paul Rapoport