Plus42
Icon Plus42

Plus42

by Thomas Okken

HP-42S Compatible RPN Calculator with Large Display and Equations

App NamePlus42
DeveloperThomas Okken
CategoryTools
Download Size9 MB
Latest Version1.1.12
Average Rating4.97
Rating Count119
Google PlayDownload
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Screenshot Plus42
Screenshot Plus42
Screenshot Plus42
Screenshot 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 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.

Recent changes:
Fixed handling of ºC and ºF return values in numeric solver.

Fixed crash for certain unrecognized key codes from Bluetooth keyboards.

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