About Plus42
Plus42 is an advanced scientific programmable calculator, based on Free42. Free42, in turn, is a complete re-implementation of the HP-42S scientific programmable RPN calculator, which was made from 1988 until 1995 by...
Plus42 is an advanced scientific programmable calculator, based on Free42. Free42, in turn, is a complete re-implementation of the HP-42S scientific programmable RPN calculator, which was made from 1988 until 1995 by Hewlett-Packard. Free42 is a complete rewrite and contains no HP code whatsoever.
Plus42 builds on Free42 and adds: Algebraic expressions modeled after those used on the HP-27S and HP-17B/19B; attached units and unit conversions modeled after those used on the HP-48/49/50 series; directories for more organized storage of programs and variables; a larger display, with 8 rows and 22 columns (131x64 pixels) by default, which the user may resize at will; time value of money and amortization schedules; and two-dimensional plotting of functions, with ability to zoom and pan, and find integrals and roots from points in the plot.
Mar 31, 2024
Version 1.1.9
Now recognizing comment delimiters '@' and ';' for program pasting.
More accurate complex ASIN/ASINH.
Previous Versions
Here you can find the changelog of Plus42 since it was posted on our website on 2022-05-09 08:32:53.
The latest version is 1.1.9 and it was updated on 2024-04-22 08:43:45. See below the changes in each version.
Plus42 version 1.1.9
Updated At: 2024-03-31
Changes: Mar 31, 2024
Version 1.1.9
Now recognizing comment delimiters '@' and ';' for program pasting.
More accurate complex ASIN/ASINH.
Plus42 version 1.1.6b
Updated At: 2024-03-22
Changes: Mar 22, 2024
Version 1.1.6b
Changed the skin loader to remove reliance on a deprecated API.
Plus42 version 1.1.4d
Updated At: 2024-02-28
Changes: Feb 28, 2024
Version 1.1.4d
Fixed crash when sharing on iPad.
Plus42 version 1.1.4a
Updated At: 2024-02-14
Changes: Feb 14, 2024
Version 1.1.4a
iPad support
Plus42 version 1.1.3
Updated At: 2024-01-17
Changes: Jan 17, 2024
Version 1.1.3
Support for external keyboards.
Added C.LN1+X and C.E^X-1 functions. These are complex-capable versions of LN1+X and E^X-1.
Plus42 version 1.1.2a
Updated At: 2023-12-09
Changes: Dec 9, 2023
Version 1.1.2a
Fixed startup crash, caused by a bug in Apple's latest compiler.
Plus42 version 1.1.1
Updated At: 2023-12-02
Changes: Dec 2, 2023
Version 1.1.1
CSLD? did not handle intervening XEQ/RTN. Fixed.
FUNC did not detect previous FUNC/LNSTK/L4STK. Fixed.
Plus42 version 1.0.21
Updated At: 2023-08-17
Changes: Aug 17, 2023
Version 1.0.21
Added string and list functions to the equation language. The new functions have been added to the FLAGS menu and CATALOG-> FCN in the equation editor. List literals have the format {A:B:C}. List elements may be any type, including lists or matrices.
Equations: Fixed stack access within matrix literals.
Fixed LASTX option in the equation editor's stack menu (R↓ key).
Fixed Y^X with units where X is a negative reciprocal.
→LIST and LIST→ didn't print in TRACE mode. Fixed.
Plus42 version 1.0.19
Updated At: 2023-05-05
Changes: May 5, 2023
Version 1.0.19
Fixed the definition of the 'ton' unit (U.S. short ton). It was 10^10 times too large, due to a missing sign in the units definition table.
Equations like [1:2:3]=A, when entered without a name, weren't parsed correctly, because the part before the first colon would be incorrectly interpreted as a name. Fixed.
When an error occurs while evaluating an equation, and that equation exists in the EQN list, pressing R/S in the EQN list view will now start editing that equation, with the cursor on the part of the equation where the error occurred.
Plus42 version 1.0.18
Updated At: 2023-04-17
Changes: Apr 17, 2023
Version 1.0.18
Fixed crash when loading state, when the current program is an equation that is only referenced by SOLVE/INTEG internal variables.
Changed Σ+/Σ- so that, in NSTK mode, they will accept a single real argument, assuming Y=0 in that case.
Added STOP() function for equation debugging.
In the equation editor, the named-equation catalog could select items from the wrong row.
Fixed handling of LCLV of indexed matrix. It used to leave any pushed indexed matrix in limbo until RTN. With this change, the pushed indexed matrix is popped immediately.
Tuned TONE frequencies to A440 scale.
Disclaimer
Official App Store Link
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