Thomas Okken

Install 100,000 - 500,000

More 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.

Top 5 User Reviews

Anonymus User

An absolutely outstanding replica of the best STEM calc ever! You won't find an original HP App for this model, since HP knows they simply can't compete with the impressive work done by Thomas. Please, download, enjoy, and donate to keep this project's updates going on! :0)

  Philip Bogardus

Really like the app. Love RPN and struggle to use phone calculator. Being an engineer geek RPN is a must to do all the cool stuff engineers do.

  Gordon Dyer

A great app I have used for many years. I have been hoping to see the full precision results for just a long, thank you Thomas!

  Antony Langmann

Wonderful app. Really useful

  Mike Jones

Just what I needed

  Michael E

This works great. I am so used to my hp 35S that this makes quick phone calcs on my phone simple. The app icon looks horrible though. With that, graphics are horrible that you would think the app sucks at first glance. But it actually does what I need it to.

Free42 wiki

Free42 has been downloaded by 100,000 - 500,000 people available all over the world, anyone can be easily downloaded from the wikinsta store. You could visit their official website to know more about the app or you can mail to them if you have any query regarding the app. This is the top famous app available in Tools category. Average rating of the app is 4.7 which is a great indication of people trust and use the app frequently. To download the app you must have your android version 2.2 and up. The price of the app is 0. According to, the public data average daily active user (DAU) of the app is 3442. With Monthly active users (MAU) of 25815. The latest version of the app is which currently installed in 60% of the users, last version 1.5.15 was published on April 1, 2017, midnight.

Free42 apk info

Category: Tools

Publish Date:

Latest Version: 1.5.15

Average Rating: 4.7

Price: Free

Requirements: 2.2 and up

Downloads: 100,000 - 500,000

Daily Active Users (DAU): 3442+

Monthly Active Users (MAU): 25815+

Official Website:


How to Download Free42

There are numerous way to download the Free42 app

  1. 1. You can download Free42 app from your mobile. Click on the play store icon after that search the name of the app Free42 then click on the official app and finally you can found the install button.
  2. 2. Go to the and search the app Free42 then google show you the app with install button click on it and your app will be installed automatically.
  3. 3. Go to the and then search theFree42app. Facebook will show you the official page, go to the official page then you will find their official website from there you can directly download the app to your mobile.
  4. 4. If you don't have an android phone in your hand, still you can download the app from the desktop (but you must be logged in with same google account in your desktop and mobile). Go to the and search the app then click on the install button.
  5. 5.You can download the app from site alsoyou can mail them to ask for the app link. Or,you can go to their official website and get the app link through SMS. Most of the site already have SMS service to download the app.

Free42 Tags