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Dib2Calc vs JRPN 15C: catalog facts
Dib2Calc	JRPN 15C
Best for: Android users who want an RPN calculator with text and data functions	Best for: People who want an HP 15C-style RPN calculator across devices
Free Free and open source under GPL-3.0-or-later.	Free Free of charge.
Android	Windows, macOS, Linux, Android, iOS, Web
Uses stack-based RPN input Includes functions for text and data structures All 3 strengths for Dib2Calc Uses stack-based RPN input Includes functions for text and data structures Can encrypt data with an access code and password	Aims to match the HP 15C's appearance and behavior Runs in a browser and on several desktop and mobile platforms All 3 strengths for JRPN 15C Aims to match the HP 15C's appearance and behavior Runs in a browser and on several desktop and mobile platforms Can import, export and share calculator programs or state
Uses RPN notation, which differs from standard calculator entry Android only	The web version is described as less well supported than desktop and mobile
Downloadable app	Downloadable app, Web application
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0-only
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Sources for Dib2Calc gitlab.com/dibdib/dib2calc Catalog checked October 8, 2026	Official website Full listing and sources Sources for JRPN 15C jrpn.jovial.com Catalog checked October 8, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.