Free42
Thomas Okken
Free42 is a re-implementation of the HP-42S calculator and the HP-82240 printer.
In-app purchases in United States
Items currently visible on Apple’s public App Store page. This may not be the complete App Store Connect catalog.
Source: Apple public App Store page · Publicly visible items only · Checked Aug 5, 2026
About Free42Storefront description supplied by Apple.
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.
Frequently asked questions
Quick answers based on the latest observed App Store data.
How much does Free42 cost in United States?
The latest observed download price is Free. Open the official App Store link to confirm the current checkout price.
Does Free42 have in-app purchases?
Apple's public page currently shows 0 purchase items in this storefront. The public list may be incomplete.