RPN-25 CE logo

RPN-25 CE for iOS

By CuVee Software $2.99

Developer's Description

RPN-25 CE is a photo-realistic simulation of Hewlett-Packard's highly popular scientific calculator HP-25 for the iPhone. Produced from August 1975 through 1978, it was the "Squash" member of the second-generation HP calculators known as the "Woodstock" series.

It was also the first programmable calculator costing less than $200.

RPN-25 CE simulates the HP-25C version released in July 1976. Its major improvement in that update was "Continuous Memory".

While the simulator works just like the original calculator, a number of carefully designed extensions make it much more powerful.


Photo-realistic look

Programmable (99 steps), subroutines, conditional loops, branching

Insert and delete steps with automatic address correction

20 registers, "non-volatile", with unrestricted store/recall arithmetic

Much faster than the original

"Live" register view supporting user interaction (run/stop, single-stepping)

"Live" stack view

Thousands separator (optional)

Selectable pause length

Program listing view with program title and description

Program library view

Store, name and retrieve any number of programs

Sharing: Files, iCloud Drive, e-mail, AirDrop, Dropbox, copy, paste, print

More than 60 programs pre-installed

More than 70 functions not available on the HP-25

Import and run RPN-32 CE and GO-25 programs

Supports Dark Mode

Calculator functions:

Statistics, including clearing statistics registers only

Factorial for arbitrary arguments

Trigonometric functions (degrees, radians, grads)

Polar/rectangular conversions

Inverse, square root, logarithm, exponential, pi


Storage arithmetic (store and recall)

Low-battery warning

Sound alerts

..and many more

Details: cuveesoft.ch/rpn25

Full Specifications

What's new in version


Release September 7, 2020
Date Added September 7, 2020

Operating Systems

Operating Systems iOS
Additional Requirements Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.


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