EarthTime vs DozClock
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
EarthTime
This app presents a universal time system based on Earth's orbit and rotation, independent of cultural constructs like months or hours. It features a unique clock display, a converter for local time, and a timer, offering a consistent global date-time.
- Universal date-time system
- Concentric dial clock display
- Local Gregorian date-time option
- EarthTime to local time converter
- EarthTime timer
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EarthTime is a global date-time system which is truly international and independent of culture. It is based on the 2 given parameters of time passing on Earth; β’ The Earth Year - an orbit around the Sun; β’ The Earth Day - a revolution around Earth's axis. The counting of the Earth years in the current era begins around the time of the first signs of human civilisation. Each year starts on the northern/southern hemisphere's spring/autumn equinox. Each day is divided into decimal fractions to express the time of day. There are no time zones, so it is always the same date-time everywhere on Earth. The EarthTime day starts and ends at midnight GMT. There are no months, weeks, hours, minutes, seconds, as these are simply human constructions which vary between cultures. Thus, the EarthTime at 2 Aug 2016 12:11am BST (when the system was first revealed to the world in the form of an App) was: 11,769 : 134.46635 The ingenious App displays the EarthTime in an innovative clock of concentric dials with an option to display local gregorian date-time. It has a calculator to convert between local and EarthTime and a timer in EarthTime. EarthTime, the most original app in years
DozClock
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The Dozenal Suite is a set of six apps of dozenal utilities. They run on Appleβs 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.
Screenshots
Verdict
The clearest difference is update cadence: DozClock at every 2 weeks against EarthTime's every 23 months. EarthTime's advantage is iOS requirement (11.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
EarthTime ships an update every 23 months, DozClock every 2 weeks. The most recent releases landed on October 3, 2026 and October 8, 2026 respectively.
| Parameter | EarthTime | DozClock |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | β |
| Update frequency | Every 23 months | Every 2 weeks β better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | β |
| Devices | iPhone, iPad, iPod β better | iPhone, iPad |
| Requires iOS | 11.0 β better | 18.0 |
| Further details β not scored | ||
| Size | 15 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | DaliFermat Ltd | Paul Rapoport |
In-app purchases
EarthTime
No in-app purchases
DozClock
No in-app purchases









