Free42

Free42 Free App

Rated 4.77/5 (1,985) —  Free Android application by Thomas Okken

Advertisements

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.

How to Download / Install

Download and install Free42 version 2.0.14 on your Android device!
Downloaded 100,000+ times, content rating: Everyone
Android package: com.thomasokken.free42, download Free42.apk

All Application Badges

Users love it
Free
downl.
Android
2.2+
For everyone
Android app

App History & Updates

What's Changed
In Export Programs, removed the hard-coded buffer size for the list of programs, so you should now see all your programs in the list, no matter how many there are.
When Pasting complex numbers in a+bi notation, the imaginary unit must now be either i or j; the alternative spellings I and J are no longer recognized.
Version update Free42 was updated to version 2.0.14
Version update Free42 was updated to version 1.5.12
More downloads  Free42 reached 100 000 - 500 000 downloads
Version update Free42 was updated to version 1.5.7

What are users saying about Free42

K70%
by K####:

Just like the vintage 1987 version I own.

K70%
by K####:

Perfect version of the calculator

K70%
by K####:

Use this almost daily.

K70%
by K####:

Excellent implementation. I use it every day.

K70%
by K####:

Works very well. Don't use a hand-held calculator anymore.

K70%
by K####:

Thanks for this emulator.

K70%
by K####:

I adore it

V70%
by V####:

This is super faithful!

E70%
by E####:

Super cool. Just like my hp15c but then better.

L70%
by L####:

Fantastic replication of beloved 42s calculator.

N70%
by N####:

Excellent, have this installed on every device I use. LCD contrast on original calc is dreadful, only reason I still use it is because of the physical keys. Haptic feedback on this app has consigned the well worn thing to the box where I keep my old 41c and my Dads 70's HP calcs.

P70%
by P####:

Why does it need precise location among other bizarre privileges? RPN only valid in certain geographies?

J70%
by J####:

Works like my real 42!!

V70%
by V####:

Back in the 80's while at university I worked at a shop which sold HP calculators, so I bought the 11c, 12c, 41CX then the 42S. After many years of faithful service through the 90's and 00's my 42S was stolen. Roll onto the 10's I finally bought a smartphone and discovered Free42. Thank You!!!

H70%
by H####:

A trip back 40 years in time to now have the best calculator I ever had, the HP45.

K70%
by K####:

Very nice app. Now I can use my tablet as a real calculator. Best one I know of.

K70%
by K####:

I have the 42S. With this app, I now always have it with me.

D70%
by D####:

Pure nostalgie

K70%
by K####:

Powerful and a simple to use man machine interface makes this calculator a must have.

K70%
by K####:

Superb. Feels like the real thing. Never fails. Like a real HP calculator.

K70%
by K####:

It's as good as my old HP42

K70%
by K####:

Very well done. A lot of memories.

K70%
by K####:

Simply great

K70%
by K####:

A great addition to my LG G3. I love that the original HP 42S look is an available skin, the only one I use. Print function integration is a major plus. I reported two very minor bugs to the author, both fixed perfectly in a couple of weeks. I never owned a real 42S, but have owned the real 45, 55, 25, 67, 97 and 41C. Love the 42S functionality. Congratulations, Thomas, and keep up the good work!

Z70%
by Z####:

Best RPN calculator and HP emulator app that I know. I use it almost daily!

E70%
by E####:

Realistic copy of my beloved calculator. Only critique is the ugly icon.

K70%
by K####:

Great implementation of the HP-42. I tell all my engineer friends about it (& the occasional non-engineer).

V70%
by V####:

Excellent! I've been using an HP32S2 for years and love RPN.

K70%
by K####:

Very good RPN calculator. Thank you to the developer.

K70%
by K####:

Very good implementation, congrats.

K70%
by K####:

Very good implementation.

M70%
by M####:

Love it. Memories!

K70%
by K####:

Perfect!

U70%
by U####:

Love it.

K70%
by K####:

I have had a 25, then a 15C - always loved HP calculators. This follows the trend perfectly.

K70%
by K####:

As a surveyor used HP calculators forever LOVE IT

K70%
by K####:

Thank you for the effort in programing this. Left my calculator at work, needed it now. Downloaded from the store. Works as expected. And it's free.

K70%
by K####:

Functional in every way. In this world full of ads, a true freeware is rare, and this is it. Kudos, Thomas Okken. Thanks!

K70%
by K####:

One word - Fantastic!

N70%
by N####:

Had an HP-32s while studying and felt immediately at home.


Share The Word!


Rating Distribution

RATING
4.85
1,985 users

5

4

3

2

1