Best Rpn Calc Apps

246+ iOS apps curated and reviewed

4.3 avg rating

14 free apps

Updated October 2026

With an average user rating of 4.3★, the rpn calc category is one of the App Store's strongest. Browse all 246+ apps we track, sorted so the most loved ones surface first.

Compare top Rpn Calc Apps (October 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	PCalc Lite	Free	4.4★ (214)	No	Yes	Oct 2026
2	RPN Calc	$0.99	4.0★ (6)	No	No	Oct 2026
3	R47 RPN Calculator	Free	5.0★ (29)	No	Yes	Oct 2026
4	Touch RPN calc	Free	3.4★ (210)	Yes	Yes	Nov 2026
5	MathU RPN Calc	$24.99	5.0★ (149)	No	No	Oct 2026
6	Free42	Free	4.8★ (287)	No	No	Nov 2026
7	RPN Calculator 48	$3.99	4.8★ (246)	No	No	Oct 2026
8	Enter — RPN Calculator	Free was $4.99	—	No	Yes	Oct 2026

Top Picks for Rpn Calc

PCalc Lite by TLA Systems Ltd.

The Best Calculator

Editor's Choice

🔧 Utilities

4.4😊(214 ratings)

FreeIn-App Purchases

This free scientific calculator offers essential features like RPN mode, unit conversions, and multiple undo/redo. It provides a taste of a more powerful version, with optional in-app purchases for expanded functionality.

What We Love

🚀 Fast and responsive
👍 Clean and intuitive interface
💡 Customizable themes and settings
🚀 Efficient performance
👍 Useful conversion tools
👍 Excellent Apple Watch support

Room to Improve

🐛 Occasional lags and crashes
🔒 Lack of dark mode support
🔒 Inconsistent icon appearance after upgrades
🔒 Limitations in RPN mode on Apple Watch
🔒 Lack of financial calculator functions

RPN Calc by James Mattis

Strong Contender

🔧 Utilities

4.0(6 ratings)

$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.

R47 RPN Calculator by MARCEL DAN

HP Program Editor & Tutorials

Worth Considering

📚 Education

5.0(29 ratings)

FreeIn-App Purchases

This scientific calculator uses Reverse Polish Notation (RPN) to help you break down complex problems. It offers a full 47-series instruction set with advanced functions and a program editor. The free version includes extensive tutorials and documentation.

More Rpn Calc apps to explore

Touch RPN calc

Financial/Sci RPN calculator

Free

This app offers a powerful RPN calculator with financial and scientific functions, mimicking popular industry-standard models. It includes programming capabilities and expandable flavors for diverse calculation needs.

RPN financial calculatorRPN scientific calculatorProgramming functions

💰 Finance

(210)

free with in-app purchases

MathU RPN Calc

Advanced scientific calculator

$24.99

This advanced scientific and financial calculator utilizes the Reverse Polish Notation (RPN) system. It offers over 96 functions, catering to professionals with features for finance, programming, and general scientific calculations. Optimized for iOS devices, it provides a robust and accurate computational experience.

RPN entry systemOver 96 functionsScientific calculations

HP-42S Calculator Simulator

Free

This app is a faithful open-source simulation of the HP-42S scientific calculator and its associated printer. It offers a complete rewrite without requiring original ROM images, allowing users to run existing programs on their mobile devices.

HP-42S calculator simulationHP-82240 printer simulationOpen-source project

RPN Scientific Calculator

$3.99

This app offers a scientific calculator with Reverse Polish Notation (RPN) functionality, providing an alternative to the default calculator. It features a large, easy-to-read display, a 100-entry stack, and extensive undo/redo capabilities. Its design is inspired by classic HP calculators.

Reverse Polish Notation (RPN)Scientific calculator functionsSwipe gestures for undo/redo

🔧 Utilities

(246)

paid

Enter — RPN Calculator

Scientific and financial RPN

RePNCalc - RPN Calculator Pro

Easy Reverse Polish Notation

Free

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.

Reverse Polish Notation (RPN) inputSwipe gesture key layout customizationLong-press stack item options

🔧 Utilities

(2)

free with in-app purchases

The classic HP48 improved

Free

This app brings the powerful HP48 calculator experience to your mobile device. It offers enhanced performance, seamless file management, and a customizable interface with support for various HP calculator models. Enjoy a familiar and convenient calculator solution without needing extra hardware.

Supports HP38, HP39, HP48, HP49, HP50 calculatorsHaptic feedback and customizable zoom optionsSeamless file transfer via iTunes and Files app

This utility app offers a scientific calculator with Reverse Polish Notation (RPN) mode for faster calculations. Its simple interface is designed for engineers and scientists, providing efficient computation on iPhone devices.

Scientific calculator functionsReverse Polish Notation (RPN) modeFast calculation

This scientific calculator displays major functions on screen and utilizes a stack for calculations. It supports a stack of up to 4 values but can store many more numbers depending on device memory.

Visible scientific functionsRPN (Reverse Polish Notation) inputStack display for up to 4 values

A programmable scientific calculator offering a classic aesthetic with modern functionality. It features a dynamic stack display, customizable buttons, and support for multiple data types, making complex calculations intuitive and accessible.

Reverse Polish Notation (RPN) inputDynamic stack display with scrollingCustomizable buttons and programming

Simple RPN Calculator

Free

This utility app functions as a reverse Polish notation calculator. Users input numbers and operations using a stack-based interface to perform calculations. It's designed for straightforward mathematical tasks.

Reverse Polish Notation (RPN) inputStack-based operationIntuitive digit and operation buttons

A straightforward calculator utilizing Reverse Polish Notation (RPN) for everyday calculations. It offers a four-level visible stack with a total capacity of 100 positions, providing visual feedback on stack fullness. Basic arithmetic operations and stack manipulation functions are included.

Reverse Polish Notation (RPN) inputFour visible stack levels100-position stack capacity

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

🔧 Utilities

(8)

free

John Cominio RPN Calculator

by John Cominio

Free

A scientific calculator utilizing Reverse Polish Notation (RPN) for complex calculations. It supports a wide array of mathematical functions including trigonometric, exponential, logarithmic, and root operations, with configurable angle units.

Reverse Polish Notation (RPN) inputComprehensive scientific functionsTrigonometric calculations (Degrees, Radians, Gradians)

📊 Productivity

(9)

free

RPN Memory Calculator

RPN Multi Function Calculator

Free

This application provides a straightforward reverse Polish notation (RPN) calculator with essential functions and memory operations. It also includes integrated unit conversions for various measurements, allowing for quick conversions directly within the app. The calculator remembers your session, preserving all registers and memory values for future use.

Reverse Polish Notation (RPN) inputSeven core calculator functionsMemory operations

📚 Education

(0)

free

FAQ about Rpn Calc

What are the best rpn calc apps for iPhone?

PCalc Lite tops our rpn calc apps ranking as of October 2026, with a 4.4-star average from 214 App Store ratings, and it's free to download.

Are there free rpn calc apps for iPhone?

Yes — 14 of the top rpn calc apps we rank are free to download, including PCalc Lite and R47 RPN Calculator.

Does PCalc Lite have ads or in-app purchases?

PCalc Lite has no ads and offers in-app purchases, according to its App Store listing as of October 2026.

How many rpn calc apps are on the App Store?

We track 246+ rpn calc apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.

Best Rpn Calc Apps

Compare top Rpn Calc Apps (October 2026)

Top Picks for Rpn Calc

What We LoveHighlights summarized from real App Store user reviews

Room to ImproveCommon complaints summarized from real App Store user reviews

More Rpn Calc apps to explore

FAQ about Rpn Calc

Related searches

What We Love

Room to Improve