# my15c — Voyager 15C Microcode Emulator

> Voyager 15C Microcode Emulator (iPhone/iPad app by Miroslav Perovic.)

- Source: https://appshunter.io/ios/app/my15c/id6796379580 (this page in markdown: same URL + `.md`)
- Developer: [Miroslav Perovic](https://appshunter.io/developer/400748424)
- Category: Utilities, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.0 · 53 MB
- Languages: American English
- Released: 2026-08-14
- Data updated: 2026-08-20
- User reviews in markdown: https://appshunter.io/ios/app/my15c/id6796379580/reviews.md

## What is my15c?

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

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock Full App | $9.99 | one-time |



## Version history (last 2 releases)

### 1.0.1 — 2026-08-15

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!

### 1.0 — 2026-08-14

No release notes.

## More apps by Miroslav Perovic

- [my41CX](https://appshunter.io/ios/app/my41cx/id979041950)
- [my59](https://appshunter.io/ios/app/my59/id6759532452)
- [my16c](https://appshunter.io/ios/app/my16c/id6762121583)
- [my11c](https://appshunter.io/ios/app/my11c/id6762810891)
- [Hole in the Floor](https://appshunter.io/ios/app/hole-in-the-floor/id6767888842)
- [myPreferans](https://appshunter.io/ios/app/mypreferans/id6789721866)

All apps by Miroslav Perovic: https://appshunter.io/developer/400748424

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-20.*