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.
Add to list
Free
95
4.8
User ratings
884
Installs
50,000+
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:
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
Mar 7, 2015
Can't imagine not having it on my phone. Had been using RPNs (32Sii and 48G) for a very long time. This app looks good and works great.
A Google User
Mar 4, 2015
A father's gift. I had a calculator like this. My father gave it to me when he worked for 25yrs in Middle East. I was a fool to have lost it when a thief stole my bag back in college. Never gotten over it. Still looking for the very same type of calculator even now, if i could afford it. The app is brilliant. Warms my heart just using it. You don't know how much this made me happy somehow. Thank you.
A Google User
Feb 27, 2015
Just works.
A Google User
Feb 20, 2015
Goof Its so amezing software
A Google User
Jan 20, 2015
Excellent RPN Calculator This is the greatest app for running numbers on any platform. My Galaxy S5 just rips through tricky numbers in meetings and catches bad ideas in hand waving, water walking spread sheets that can cause delays and waste money. If you can think in RPN, follow the documentation trail and load this app on everything you own. Get the big gun on your side, and shoot low--they might be crawling..