Best RPNPro alternatives: apps like RPNPro

10+ similar apps compared and reviewed

4.3 avg rating

7 free apps

Updated October 2026

RPNPro

Felix Meier

🔧 Utilities

📊 Productivity

Looking for something like RPNPro? We've analyzed 10+ similar apps to help you find the best alternative. Each app is compared by ratings, features, and real user reviews, so you can make the right choice.

Top Alternatives to RPNPro

RPNu by Scott Johnson

Editor's Choice

🔧 Utilities

0.0(0 ratings)

Free

RePNCalc - RPN Calculator Pro by Michael Redig

Easy Reverse Polish Notation

Strong Contender

🔧 Utilities

5.0(2 ratings)

FreeIn-App Purchases

RePNCalc - RPN Calculator Pro screenshot 1

RePNCalc - RPN Calculator Pro screenshot 2

This utility app offers a Reverse Polish Notation (RPN) calculator experience for iOS devices. It features customizable key layouts via swipe gestures and long-press options for stack items. External keyboard support is also available.

Calccis by Jukka Aittola

A RPN calculator

Worth Considering

🔧 Utilities

0.0(0 ratings)

Free

More apps like RPNPro

RPN Calc

by James Mattis

$0.99

This app provides a straightforward reverse Polish notation (RPN) calculator experience, inspired by classic HP models. It offers a clean interface with large buttons for quick calculations on iPhone, iPad, and Apple Watch, along with a convenient Today Extension for immediate access.

Reverse Polish Notation (RPN) inputClean, simple interfaceLarge, easy-to-press buttons

This utility app provides a Reverse Polish Notation (RPN) calculator. Users can extend its functionality by programming custom functions and equations using JavaScript.

Reverse Polish Notation (RPN) calculatorUser-programmable functionsJavaScript equation support

|RPN| Scientific Calculator

by Bradley Smith

$0.99

This calculator app uses Reverse Polish Notation for powerful calculations. It offers customizable color schemes, layouts, and online help, designed for flexibility and usability. All features are unlocked with a one-time purchase.

Reverse Polish Notation (RPN)Viewable stackSelectable portrait/landscape layouts

This app faithfully recreates the 1975 HP-21 pocket scientific calculator, offering RPN functionality and a full suite of mathematical, trigonometric, and logarithmic functions. It features a 10-digit LED display, stack and storage registers, and a keystroke log for detailed operation tracking.

RPN (Reverse Polish Notation)10-digit LED calculator displayFour stack registers with roll down

Tone Flow: Sound Therapy

Sound Frequency Generator

Free

This app generates over 80 curated sound frequencies for wellness, meditation, and relaxation. Explore various categories like Solfeggio and Chakra, or create custom tones with multiple waveform options. Enjoy background playback and lock screen controls for seamless use.

80+ curated sound frequenciesMultiple waveform options (Pro)Custom frequency creation

🔧 Utilities

(1)

free with in-app purchases

This utility app functions as a Reverse Polish Notation calculator. It handles complex numbers and utilizes extended precision for all calculations, offering an unlimited stack depth and an undo feature for up to 10 operations.

Reverse Polish Notation (RPN) inputComplex number calculationsExtended precision math