Software · Utilities & files

jrpn15

jrpn15 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 October 2026)
Latest activity: 7 October 2026
Source code: github.com/zathras/jrpn

At a glance

All of jrpn15 is free: no feature is locked behind a paid plan, and its code is open.

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

Scientific RPN calculator that simulates an HP 15C. It simulates the appearance and behavior of the original, including the seven-segment display, and the little blink you get when entering numbers. 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.

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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