RPN-25 CE — Photo-realistic HP-25C simulator for the iPhone

Version 1.5

RPN-25 CE is a simulation of Hewlett-Packard's popular second-generation scientific calculator HP-25C.

Released on August 1, 1975, the HP-25 scientific calculator was the second member of the so-called "Woodstock" series (between the HP-21 and the HP-22.) It was followed a year later by the improved version HP-25C which sported "continuous" (non-volatile) memory. Both versions were discontinued in 1978.

RPN-25 CE is an enhanced version of the HP-25C.



Tap the wrench symbol or double-tap the display to access the
settings screen:



Version History RPN-25 CE

1.5 – Sep 24, 2020
  • New:
  • • More than 80 new functions added
  • • Much simplified inserting of Extra Functions:
      1. Triple-tap display in PRGM mode
      2. Double-tap desired function

  • Bug Fix:
  • • The thousand's separator setting was lost after restarting the app

1.0 – Sep 2, 2020
  • First public version.


RPN-25 CE is available here:




Looking for a manual?

(External Link)


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