# RPN-25 CE

> Highly popular 1975 calculator

Canonical page: [https://chrome-stats.com/d/id1529311398](https://chrome-stats.com/d/id1529311398)

## Overview

- **ID:** `id1529311398`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** CuVee Software
- **Category:** Utilities
- **Rating:** 4.60 / 5 (9 ratings)
- **Version:** 5.4
- **Last updated:** 2025-10-16
- **First published:** 2020-09-02
- **Size:** 28 MB
- **Data as of:** 2026-09-07
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/rpn-25-ce/id1529311398)
- **Website:** [https://www.cuveesoft.ch](https://www.cuveesoft.ch/)
- **Privacy policy:** [https://www.cuveesoft.ch/privacy/index.html](https://www.cuveesoft.ch/privacy/index.html)

## 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 massively more powerful.

Features:

• Photo-realistic look
• Programmable (99 or 999 steps), subroutines, conditional loops, branching
• Insert and delete steps with automatic address correction
• 15 user-defined function keys of up to 6 characters each, redefinable under program control
• Programmable text messages
• Program Auto-Start option upon loading
• 100 symbolic labels
• 100 visible registers, "non-volatile", with unrestricted store/recall arithmetic
• 100 flags, visible at a glance
• Single-step constants
• Program comments
• Program library with more than 150 programs pre-installed
• More than 270 functions and operations not available on the HP-25
• 100 sounds built-in
• Much faster than the original
• "Live" register view supporting user interaction (run/stop, single-stepping)
• "Live" stack view
• Thousands separator (optional)
• High-contrast display (optional)
• Selectable pause length (up to a day)
• 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
• Import and run RPN-32 CE and GO-25 programs
• Run a large number of HP-41 programs with little or no changes
• Clock display (AM/PM or 24h)
• 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
• Percentage
• Storage arithmetic (store and recall)
• Extended stack operations
• Low-battery warning
• Sound alerts
• ..and many, many more

Details: cuveesoft.ch/rpn25

## Rankings

- #346,958 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id1529311398)