Free42

Free42: Open-Source Programmable Calculator App

Free42 is an open-source programmable calculator app designed to emulate the HP-42S calculator. It provides RPN mode, programming capability, expandability via packages, and accurate emulation of the original HP-42S.

What is Free42?

Free42 is an open-source, cross-platform calculator application designed to emulate the HP-42S calculator. It was created by Thomas Okken in 2002 and is available for Windows, Mac, Linux, iOS, and Android devices.

Free42 provides a complete and accurate emulation of the original HP-42S calculator, including RPN mode, programming capability, continuous memory, and expandability via Free42 packages. It supports complex numbers, matrices, conversions, solvers, and more. The interface closely resembles the real HP-42S.

Key features of Free42 include:

• Accurate emulation of HP-42S calculator and functionality
• RPN mode and algebraic mode support
• Programmability - create and run custom programs
• Support for complex numbers and matrices
• Additional functions via expandable packages
• Available on many platforms - Windows, Mac, Linux, iOS, Android
• Open source software released under GPL

Free42 is ideal for engineers, programmers, students, or anyone who previously used an HP calculator and wants that experience on their modern devices. With its expandability, Free42 can adapt to numerous calculation and programming needs while remaining lightweight and responsive.

Free42 Features

Official Links