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Free42

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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
95
4.8
User ratings
746
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.

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
Oct 13, 2014
Love it but default graphics are poor After using this 42S calc on my pc for a few years, I am really glad that it is now available on Android. My only qualm is that the graphics on a hi-res screen is poor.
A Google User
Oct 9, 2014
LA MEJOR Está es La mejor calculadora Hp de la Historia
A Google User
Sep 25, 2014
Key vibration not working? Love the app, thanks. However, a while back key vibration stopped working (device is S3, rooted 4.4.) If you could fix it, that would be wonderful. Thanks!
A Google User
Sep 19, 2014
Fantastic HP calculator emulator This is so much like my beloved HP 32s (my favorite of my 4 HP's (21c, 25c, 11c, and 32s). The most significant difference (and it's a plus) is that in displays both the X and Y registers. This seems to be one of the harder HP emulators to find but I think its one of the best. In my opinion, calculators like the 32 and 11c give you almost anything you need without all the (again, my opinion) glitz of the whiz-bang calculators with graphing, etc. Before you get on my case, I understand that this stuff is useful for some but I don't need it and it just gets in the way of all the functionality I want in a calculator. (p.s. I still have and use my 11c and 32s)
A Google User
Sep 14, 2014
Good stuff Engineering marvel