my15c

Name: my15c
Author: Miroslav Perovic

Voyager 15C Microcode Emulator

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📚 Education

🔧 Utilities

Free

In-App Purchases

Rating summary

Details

Released
Updated
Version
Compatibility
Age Rating
Size
Devices
Data updated
Languages

August 14, 2026
August 15, 2026
1.0.1
iOS 26.0+
4+
53.33MB
Mac, iPhone, iPad
19 hours ago
American English

Features

Supports Vision Pro

Developer

Miroslav Perovic

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🧾$9.99

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About

my15C is a faithful emulation of the classic 15C — the legendary RPN scientific programmable calculator, running the original Voyager-series microcode ROM, cycle-accurate. Built for engineers, scientists, and RPN enthusiasts who want the real thing in their pocket — not just a look-alike. FEATURES • Authentic 15C ROM emulation — same logic, same quirks as the original 1982 hardware • Full RPN entry with a 4-level stack • Complex number arithmetic • Matrix operations • Numerical integration (∫f(x)) • Root solving (SOLVE) • Full programmability — write, edit, and run your own programs • Continuous memory with iCloud sync across your devices • Authentic 7-segment LCD display and keyboard layout • Landscape-optimized for iPhone, iPad, and Mac

What's New in my15c

1.0.1

August 15, 2026

Self-tests are here! This update brings the calculator's built-in diagnostic tests to life, working exactly as on the original hardware: • Self-test — hold × and ON: the ROM runs its full diagnostic and finishes with the famous all-segments display • Keyboard test — hold ÷ and ON, then press every key in sequence • Continuous self-test — hold + and ON for the endless diagnostic loop All three are also available from the Calculator menu on Mac. Under the hood: • More accurate emulation of the display driver hardware, verified against a real calculator • The display now shows the complete set of annunciators, positioned to match the original LCD glass • Improved handling of simultaneous key presses Thanks to the community at the Museum of HP Calculators forum for the sharp observations that led to this update!