(2,742 ratings)

Implemented support for user-defined function semantics: stack preservation, RTN with skip, RTN with error. See the Free42 web site for details.

Better handling of number lines: the visual difference between equivalent representations of a number is now preserved, so 1000 stays 1000 and is not turned into 1E3, for example.

Implemented FMA (Fused Multiply-Add).

In programs, now handles pasting FIX/SCI/ENG with 1-digit argument, for HP-41 compatibility.

Free42 is a re-implementation of the HP-42S calculator and the HP-82240 printer.
It is a complete rewrite, not using any HP code, and it does not require an HP-42S ROM image.
Free42 is an Open Source project. The executables and source code are released under the terms of the GNU General Public License, version 2.
All third-party code used in Free42 is either in the public domain, or licensed under terms compatible with GPLv2, or used with the authors' permission.

See available APKs
There's a more recent version available below!

This release may come in several variants. Consult our handy FAQ to see which download is right for you.

130 APK
January 6, 2021
arm64-v8a + armeabi-v7a
Android 4.0+
All Releases
January 17, 2021
January 13, 2021
January 6, 2021
November 25, 2020
November 23, 2020
October 25, 2020
September 20, 2020
July 5, 2020
April 12, 2020
February 28, 2020