About Janus Calculator
Two-sided calculator. Side A uses Standard Notation, Side B uses Reverse Polish Notation. Both calculators are programmable, include various finance and scientific functions, and the values of 45 physical constants. Also...
Two-sided calculator. Side A uses Standard Notation, Side B uses Reverse Polish Notation. Both calculators are programmable, include various finance and scientific functions, and the values of 45 physical constants. Also includes a Black-Scholes option calculator, including calculation of implied values for each of the inputs.
Version History Update to IOS26 2.3 Apr 29 Updated to IOS15 2.2 12/12/2021 Bug fix for display in certain orientations 2.1 11/10/2018 Update to iOS 10.3, including 64-bit to eliminate "this will slow down your iPhone" messages. Support for display in landscape. Black-Scholes was working on Reverse Polish calculator but not Standard calculator. Now it works on both. Fixed stack operation in RPN mode. Other minor bug fixes. "MEM" function to enable display of calculator's memory (to remind you what you saved in register 6, for example.) Number display now includes commas. Three assignable buttons for running programs. Two new stats buttons - skewness of a distribution, and slope/intercept of a regression line. 2.0 07/20/2017 1.0 05/26/2010
Previous Versions
Here you can find the changelog of Janus Calculator since it was posted on our website on 2016-11-09 14:37:55.
The latest version is 2.3 and it was updated on 2026-07-01 08:50:27. See below the changes in each version.
Janus Calculator version 2.3
Updated At: 2026-07-01
Changes: Version History Update to IOS26 2.3 Apr 29 Updated to IOS15 2.2 12/12/2021 Bug fix for display in certain orientations 2.1 11/10/2018 Update to iOS 10.3, including 64-bit to eliminate "this will slow down your iPhone" messages.
Support for display in landscape.
Black-Scholes was working on Reverse Polish calculator but not Standard calculator. Now it works on both.
Fixed stack operation in RPN mode.
Other minor bug fixes.
"MEM" function to enable display of calculator's memory (to remind you what you saved in register 6, for example.)
Number display now includes commas.
Three assignable buttons for running programs.
Two new stats buttons - skewness of a distribution, and slope/intercept of a regression line. 2.0 07/20/2017 1.0 05/26/2010
Janus Calculator version 2.2
Updated At: 2021-12-12
Changes: Updated to IOS15
Janus Calculator version 2.2
Updated At: 2021-12-12
Changes: Dec 12, 2021 Version 2.2
Updated to IOS15
Janus Calculator version 2.1
Updated At: 2018-11-10
Changes: 10 Nov 2018 Version 2.1
Bug fix for display in certain orientations
Janus Calculator version 2.1
Updated At: 2018-11-10
Changes: Nov 10, 2018 Version 2.1
Bug fix for display in certain orientations
Janus Calculator version 1.0
Updated At: 2010-05-26
Janus Calculator version 2.1
Updated At: 1970-01-01
Changes: 2018年11月10日 Version 2.1
Bug fix for display in certain orientations
Disclaimer
Official App Store Link
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