RPN 50gHP 32SII RPN scientific calculator for iPhone, iPad and MacRPN 32sII — the engineers' RPN calculator of the 1990s, to twelve digits.
The HP 32SII is HP's RPN scientific calculator of the 1990s, the one engineers kept on their desks: a one-line display with menus over its top row of keys, fractions, equations you type and solve, integration, complex numbers, number bases, statistics, and keystroke programs. RPN 32sII puts one on your iPhone, iPad and Mac, with the face, the keyboard and the display of the real thing.
What you get
Computes as the 32SII does
A new simulator written from the calculator's owner's manual, every worked example and application program of the manual serving as a test: twelve digits, with its menus, messages and prompts.
RPN
The four-level stack and LAST X; 27 variables, indirect addressing through i, storage and recall arithmetic.
Fractions
Shown and typed as fractions, with their denominators, their three formats and their accuracy marks.
Equations, SOLVE and integration
Type equations in the equation list, evaluate them, SOLVE them for any variable, integrate them.
Complex numbers and bases
Complex arithmetic, powers, logarithms and trigonometry in pairs of registers; hexadecimal, octal and binary on 36 bits.
Statistics and conversions
One or two variables: means, weighted mean, standard deviations, linear regression and estimates; the unit conversions.
Keystroke programming
384 bytes of programs: labels, GTO and XEQ, tests, flags, ISG and DSE loops, INPUT and VIEW, SOLVE and integration of a program.
The real face, memory, manuals
The face is a photograph of an HP 32SII; Continuous Memory as on the calculator; HP's Owner's Manual downloaded and read next to it.
Offline, private
No account, no ads, no tracking, no data collection; the network is used only to download a manual you ask for.
In use
Why an HP 32SII?
The HP 32SII (1991) was HP's compact RPN scientific calculator for engineers and surveyors, prized for its solver, its integration, its fractions and its keystroke programming, and long after it was discontinued it is still sought after. RPN 32sII brings it back on the iPhone, iPad and Mac, computing to its twelve digits. Its successor, the HP 35s, is RPN 35s; the HP 15C is RPN 15C.
About the calculator
The app contains no HP software and needs no ROM: the calculator was written from its owner's manual alone, its worked examples and application programs serving as tests. The network is used only to download one of HP's manuals when you ask for it; everything else stays on your device.