Software · Utilities & files

jrpn16

jrpn16 is a calculator, available on Linux.

Completely free
Linux
Open source

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Geographic availability: No geographic restriction found in our sources; availability is not checked country by country.

Technical details

Pricing: Completely freeconfirmed by Flathub
Excerpt from jrpn.jovial.com, read on 10 November 2026
t in order to give away ios software for free, you have to go through a bunch of administration and pay apple $100 a year for the privilege. it's not really about the amount of money -- it's more about the ongoing hassle. well, and ten bucks a month for nothing tangible in return is a stret Open the page
License: GPL-3.0 — Open source (copyleft)confirmed by Flathub
Open source: Yes
Commercial use: Yesconfirmed by Official plan pages (pricing, licence, terms), Flathub
Account required: not documented
Credit card required: Noconfirmed by Flathub
Watermark: Not applicable
Ads: not documented
Platforms: LinuxEstablished by Linux: Flathub
Publisher: Bill Foote
Latest version: 1.0.0 (1 September 2026)
Latest activity: 6 October 2026
Source code: github.com/zathras/jrpn

At a glance

jrpn16 is completely free: it is open source software, and every feature is available without paying or subscribing.

Its licence (GPL-3.0) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Plans and conditions

The publisher also offers paid plans (hosting, support or services); they are described on its website.

Strengths

Open source code
Commercial use allowed

About

Programmer's calculator that simulates an HP 16C. It simulates the appearance and behavior of the original, including the seven-segment display, and the little blink you get when entering numbers. The 16C's windowing functions are implemented, but can be disabled to allow the display of longer numbers at one time. Full source is available on Github. There is no advertising of any kind -- this is a hobby project, and a bit of a labor of love. Do be aware that the 16C is a calculator intended for computer programmers. If you're not familiar with hexadecimal or stack-based RPN calculators, this probably isn't what you're looking for!

Description from Flathub — AppStream (Flathub)

Sources and checks

Facts collected from Official plan pages (pricing, licence, terms) (limits, commercial use) — 10 November 2026
Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) — 9 November 2026
Last technical check: 8 November 2026
Description from Flathub — AppStream (Flathub)

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