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JRPN 15CPCalc
Free

Free of charge.

 Paid

Paid app, sold separately for Mac and for iOS devices.

Windows, macOS, Linux, Android, iOS, Web macOS, iOS
  • Aims to match the HP 15C's appearance and behavior
  • Runs in a browser and on several desktop and mobile platforms
  • RPN mode alongside standard entry with parentheses
  • Hexadecimal, octal and binary calculations
  • The web version is described as less well supported than desktop and mobile
  • Apple platforms only
  • Paid, with Mac and iOS versions bought separately
Downloadable app, Web application Downloadable app
Open source Closed source
License: GPL-3.0-only License not stated
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

Checked October 8, 2026

Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.