Hour Calc vs Dozen Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Hour Calc
Converts time between hours:minutes and decimal hours formats. Features include easy input, minute validation, and autocompletion for readability. Supports iPhone and iPad with autosized tables.
- Hours:minutes to decimal hours conversion
- Decimal hours to hours:minutes conversion
- Easy number keypad input
- Minute input validation
- Autocompletion for readability
- Native iPad support
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A small utility that converts hours:minutes format to decimal hours (h.xx), also called industrial hours, and vice versa. Features: • Easy input with number keypad on iPhone and iPod Touch • Check for minute input and warning on more than 59min • Autocompletion if less than 10min are entered for better readability (5h 2min will show as 5:02) • Independent tables for both calculators • Possibility to delete single values in both tables for correction • Clear button for complete deletion of tables • Autosized tables on iPhone 5 showing 5 entries • Native iPad support • 100% add free Please give a good rating if you like the app to support further development. For any questions send a email.
Dozen Clock
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Dozen Clock shows the time in a different way than other clocks and watches. In digital and analog format, too. It enables the user to have a tricky but still precise display of time enabling perhaps new ideas to root and grow. Released currently exclusively for Apple products, the application is able to display the date also in the format according to the Japanese calendar. INSTRUCTIONS: The biggest rectangle in the middle shows the minutes ( numbers outside the circle ). The small rectangle in the middle shows the hour ( darker numbers inside the circle ). The small red rectangle in the middle shows the seconds ( no numbers since it functions like in normal clocks ). "Think different." - Steve Jobs
Screenshots
Verdict
The clearest difference is update cadence: Dozen Clock at every 2 days against Hour Calc's every 3 months. Dozen Clock also leads on device support (5 vs 3). Hour Calc's advantage is price ($0.99 vs $1.99) and iOS requirement (8.0 vs 15.0). On ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Hour Calc costs $0.99 and Dozen Clock $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Hour Calc ships an update every 3 months, Dozen Clock every 2 days. The most recent releases landed on September 6, 2026 and August 7, 2026 respectively.
| Parameter | Hour Calc | Dozen Clock |
|---|---|---|
| Price | $0.99 — better | $1.99 |
| Rating | 4.0 (1 ratings) — better | — |
| Positive reviews | 87.5% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac, Apple Watch — better |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 8 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Guenter Freytag | Gergo Blasko |
In-app purchases
Hour Calc
No in-app purchases
Dozen Clock
No in-app purchases
Questions
Is Hour Calc free?
Is Dozen Clock free?
Do Hour Calc or Dozen Clock have ads?
Which is updated more often, Hour Calc or Dozen Clock?
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