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:
Eentering a number with an empty exponent (e.g. 1E or 1E-) would yield . Fixed.
When the screen orientation was set to "automatic", it would not honor any system-wide orientation lock. Fixed.
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Free
95
4.8
User ratings
834
Installs
50,000+
Concerns
0
File size
3302 kb
Screenshots
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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:
Eentering a number with an empty exponent (e.g. 1E or 1E-) would yield . Fixed.
When the screen orientation was set to "automatic", it would not honor any system-wide orientation lock. Fixed.

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
Jan 9, 2015
Omg! Great HP 42s emulator. Period.
A Google User
Jan 9, 2015
Love Having used many HP brand, RPN calculators, this is awesome! Once a person learns RPN notation, they'll never go back.
A Google User
Jan 2, 2015
I love it I love this calculator (Android ver). I've used it for work running programs in the twinkling of an eye where my physical 35s takes upto 45 seconds. I've been an hp fan since 1980 and now wish I'd got a 42s. Planning to get an iphone6 so hope it works as well on that. Thank you Thomas O.
A Google User
Dec 25, 2014
Perfect Does exactly what it says it does. Perfect emulation of my favorite calculator. It's cheaper to by an android phone and this app than to by a used HP-42S.
A Google User
Dec 23, 2014
Free42 (hp42S) Best of all Android free apps so far. Wunderbar!