HP-15C
HP-15C is a desktop simulator of the classic HP-15C scientific programmable calculator for macOS, focused on RPN math, programming, and engineering-style workflows.
What is HP-15C?
HP-15C is a scientific programmable calculator simulator for macOS that recreates the classic HP-15C experience on a desktop Mac. It is designed for users who prefer Reverse Polish Notation, programmable calculation workflows, and the original HP-15C feature set for engineering, math, and technical problem-solving. The app supports functions such as complex numbers, matrix operations, numerical integration, root solving, statistics, and program storage. It also adds desktop-oriented conveniences including mouse and keyboard input, clipboard support, save and load for calculator programs, and HTML export for program documentation. This version is distributed as HP-15C Simulator by Torsten Manz and is also available for Windows and Linux. It fits best for enthusiasts, students, and professionals who want a software version of a classic programmable calculator on Mac.
Key features
- Perform RPN-based scientific and programmable calculations
- Work with complex numbers, matrices, statistics, and trigonometric functions
- Solve equations and run numerical integration workflows
- Save and load calculator programs from disk
- Use mouse, keyboard, and clipboard integration on macOS
- Export stored programs and documentation as HTML
- View stack, registers, flags, and matrices through pop-up menus
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Safety overview
Status: Use with caution
This is a legitimate calculator simulator, but macOS users may encounter security warnings because the app is not fully signed for Apple's current trust model. That does not make it harmful by itself, but it means installation may require extra care and should be done only if you intentionally want this calculator app from its official site. It does not need unusual access for its main purpose beyond normal file access when you save or load programs.
Recommendation: Keep HP-15C if you use it for programmable scientific calculations or prefer the classic HP-15C workflow on your Mac. If you do not use it, you can remove it like other user-installed apps without affecting macOS, though any saved calculator programs or custom settings tied to the app may no longer be available inside it.
Common paths
/Applications/HP-15C.app
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