GO-25 SciRPN

GO-25 SciRPN

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Logo of GO-25 SciRPN

GO-25 SciRPN: The Iconic 1976 RPN Calculator, Perfected for Today

The ultimate simulation of the HP-25C. Experience the efficiency of Reverse Polish Notation, the classic four-register stack, and 99-step programming on all your Apple devices.

Download on App Store

Publisher

Stephen Lidie

Category

Utilities

Downloads

7K+

User Rating

4.8/5

Total Ratings

0

Locales

1

Vintage Precision

Discover the interface used by 7K+ users.

Retro scientific calculator interface with red LED display and RPN buttons

Retro scientific calculator interface with red LED display and RPN buttons

Help menu and topics for the GO-25 SciRPN pocket calculator app.

Help menu and topics for the GO-25 SciRPN pocket calculator app.

Screenshot of the GO-25 SciRPN app showing a mathematical formula and its corresponding program steps for calculation.

Screenshot of the GO-25 SciRPN app showing a mathematical formula and its corresponding program steps for calculation.

High visibility and high contrast display options for the GO-25 SciRPN calculator app.

High visibility and high contrast display options for the GO-25 SciRPN calculator app.

iOS print options screen showing a program code preview for the GO-25 SciRPN calculator app

iOS print options screen showing a program code preview for the GO-25 SciRPN calculator app

Interface of the GO-25 SciRPN app simulating a vintage HP-25C scientific calculator with a red LED display and functional buttons

Interface of the GO-25 SciRPN app simulating a vintage HP-25C scientific calculator with a red LED display and functional buttons

The settings screen of the GO-25 SciRPN app showing customization options for the calculator display and programming features

The settings screen of the GO-25 SciRPN app showing customization options for the calculator display and programming features

Settings screen for adjusting program execution speed in the GO-25 SciRPN app

Settings screen for adjusting program execution speed in the GO-25 SciRPN app

Keyboard shortcut mapping for GO-25 SciRPN scientific calculator functions

Keyboard shortcut mapping for GO-25 SciRPN scientific calculator functions

Annotations screen of GO-25 SciRPN showing register data and calculation history

Annotations screen of GO-25 SciRPN showing register data and calculation history

Vintage Precision Meets Modern Workflow

The tools that make this app stand out, trusted by 7K+ users.

Efficient RPN Logic

Skip the parentheses. Use the classic four-register stack to perform complex multi-step calculations with fewer keystrokes and total logical clarity.

📜

99-Step Programming

Automate your most used engineering formulas. Write, debug with single-step execution, and export your programs via email or iTunes sharing.

📟

Verifiable Accuracy

Never lose track of your math. Live views of the stack registers and a detailed keystroke log provide the transparency needed for professional-grade work.

About the app

Everything you need to know about GO-25 SciRPN.

Description

GO-25 SciRPN simulates the venerable HP-25C Programmable Scientific Calculator from 1976. Virtually indistinguishable from the real item in operation, GO-25 is a powerful yet simple retro calculator. • RPN (Reverse Polish Notation) • 10-digit LED calculator display, 10-99 to 10+99 • Four stack registers with roll down • Ten storage registers with arithmetic memory operators • Math, trigonometric, polar/rectangular, sexagesimal/decimal, logarithmic, statistical, power and other miscellaneous functions • Programmable, with annotated program listing, and memory for 99 program steps • Library of Sample Programs • Fast, slow or single step program execution • Program import via pasteboard or from other Apps • Program export via printer, email, pasteboard or to others Apps • iTunes program File Sharing • Two additional windows with views of: ◦ stack/storage registers ◦ keystroke log ◦ program source code ◦ program documentation • Copy-from and Paste-to the calculator display • Simple Paper Tape annotations

Latest Version

5.1

Size

12.9 MB

First Released

Mar 20, 2011

Put the Power of the HP-25C in Your Pocket

Experience the precision of the four-register stack and the elegance of RPN. Download GO-25 SciRPN today and reclaim the efficiency of 1976 engineering.

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