Free42

Free42


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.

Recent changes:
Fixed ACOS: it used to return 0 for acos(-1).
That bug was introduced in version 1.5.3.
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Free
96
4.8
User ratings
673
Installs
10,000+
Concerns
0
File size
3302 kb
Screenshots
Screenshot of Free42 Screenshot of Free42

About Free42
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.

Recent changes:
Fixed ACOS: it used to return 0 for acos(-1).
That bug was introduced in version 1.5.3.

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User reviews of Free42
I have been a HP-42s user since 1991. I am very pleased with the Free42 emulator. I have used the versions for Palm OS, Windows, and now Android.
Apr 11, 2011
Android Market Comments
A Google User
6 days ago
Free 42 is fantastic! I love the Free 42 project. It does precisely what is says it does, no more and no less. Which is exactly what I want.
A Google User
Jul 24, 2014
Like the real thing... I use it every day. It brings the power of the great HP42 to my phone. Great job...
A Google User
Jul 18, 2014
Perfect simulation of HP42 I put my new HP35S away and now just use this on my phone instead.
A Google User
Jul 17, 2014
Best RPN Definitely the best RPN on Android, with the same look & feel on Windows. I use it almost every day and it's always a pleasure.
A Google User
Jul 14, 2014
Chummy Awesome.....this is a must have app for those that can't survive with there trusted HP42s