About Dozecal
Dozecal is an educational RPN* calculator to promote the use of Base Twelve in math and science. The usual math functions are available in both DUODECIMAL and DECIMAL modes. Conversion is automatically made when switching...
Dozecal is an educational RPN* calculator to promote the use of Base Twelve in math and science. The usual math functions are available in both DUODECIMAL and DECIMAL modes. Conversion is automatically made when switching from one mode to the other one. Trigonometric operations uses DEGREE as unit of measure. For more information about Base 12, please visit the Dozenal Society of America. * RPN : the Dozecalc calculator uses the Reverse Polish Notation (RPN). This notation seems complex but has many advantages over algebraic notation and is more intuitive once you have understood the idea. The calculator has a stack and any operation that requires two numbers is using the bottom stack layers (X and Y). Key ENTER to push the stack up and separate one number from the next. To perform arithmetic, key in the first number, press ENTER to separate the first number from the second, then key in the second number and then select and operator such as the numerical functions +, -, * or /. The result appears immediately after you press the numerical function key. The operator is keyed in only after both operands are in the stack. Example: calculate 3 + 4 Key sequence: 3 ENTER 4 + Result: 7 The result of any operation may itself become an operand. You do not need to press enter again to use the result. The "7" is already entered. Example: add 2 to the previous result Key sequence: 2 + Result: 9 Example: calculate 5 * (3 + 4) Key sequence: 3 ENTER 4 + 5 * Alternate key sequence: 5 ENTER 3 ENTER 4 + * Disclaimer: results and precision may occasionally be incorrect. Should you report them at
[email protected], and the author will be happy to fix !
Version History Some minor bug fixes 1.0.9 08/10/2025 • Fixed: a wrong calculation with logarithms. • Improved: one can now enter up to 20d (decimal) or 18z (dozenal) digits for a better precision. 1.0.7 01/31/2024 Bug fixes : ipad support in landscape mode and issue with y^x function. 1.0.6 09/07/2023 Switch to the PITMAN representation of 10d and 11d. About section: f+EEX. Bug fixes. 1.0.5 09/04/2023 • Avoid engineering notation for simple numbers such as 0;00000xyz, for better readability. • A short RPN tutorial is available (EEX key). 1.0.3 11/20/2022 Bug fixes release: better management of the stack (x, y, z, t) in order to get closer to the RPN original way. Reminder: this calculator is based on the Reverse Polish Notation, that means that it works like you would do with a piece of paper. e.g. for this operation "23+17/5", the sequence is: 23 ENTER 17 ENTER 5 / + 1.0.2 01/27/2022 1.0.0 07/02/2020
Previous Versions
Here you can find the changelog of Dozecal since it was posted on our website on 2025-05-02 15:58:49.
The latest version is 1.0.9 and it was updated on 2026-06-10 14:25:12. See below the changes in each version.
Dozecal version 1.0.9
Updated At: 2026-06-10
Changes: Version History Some minor bug fixes 1.0.9 08/10/2025 • Fixed: a wrong calculation with logarithms.
• Improved: one can now enter up to 20d (decimal) or 18z (dozenal) digits for a better precision. 1.0.7 01/31/2024 Bug fixes : ipad support in landscape mode and issue with y^x function. 1.0.6 09/07/2023 Switch to the PITMAN representation of 10d and 11d.
About section: f+EEX.
Bug fixes. 1.0.5 09/04/2023 • Avoid engineering notation for simple numbers such as 0;00000xyz, for better readability.
• A short RPN tutorial is available (EEX key). 1.0.3 11/20/2022 Bug fixes release: better management of the stack (x, y, z, t) in order to get closer to the RPN original way.
Reminder: this calculator is based on the Reverse Polish Notation, that means that it works like you would do with a piece of paper.
e.g. for this operation "23+17/5", the sequence is:
23 ENTER
17 ENTER
5
/
+ 1.0.2 01/27/2022 1.0.0 07/02/2020
Dozecal version 1.0.9
Updated At: 2025-08-10
Changes: Some minor bug fixes
Dozecal version 1.0.9
Updated At: 2025-08-10
Changes: Aug 10, 2025
Version 1.0.9
Some minor bug fixes
Dozecal version 1.0.7
Updated At: 2024-01-31
Changes: Jan 31, 2024
Version 1.0.7
• Fixed: a wrong calculation with logarithms.
• Improved: one can now enter up to 20d (decimal) or 18z (dozenal) digits for a better precision.
Disclaimer
Official App Store Link
We do not host Dozecal on our servers. We did not scan it for viruses, adware, spyware or other type of malware. This app is hosted by Apple and passed their terms and conditions to be listed there. We recommend caution when installing it.
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