GO-21 SciRPN

Steve Lidie · Utilities

4.9 13 ratings $2.99

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About

GO-21 SciRPN simulates the venerable HP-21 Pocket Scientific Calculator from 1975. Virtually indistinguishable from the real item in operation, GO-21 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 • One storage register with arithmetic memory operators • Math, trigonometric, polar/rectangular, logarithmic, power and other miscellaneous functions • One additional window with views of: ◦ stack/storage registers ◦ keystroke log • Copy-from and Paste-to the calculator display • Simple Paper Tape annotations

What's new · 26.5.1

- Repair broken icon and update documentation. - Update to Apple OS versions 26.5.1.

Details

DeveloperSteve Lidie
ReleasedAug 2009
UpdatedJun 2026
Version26.5.1
Size15.8 MB
RequiresiOS 16.0 or later
Age rating4+
LanguagesEnglish
Price$2.99
Categories UtilitiesProductivity
Bundle IDcom.bigcatos.GO-21