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Best apps like RPN Calculator free

10+ similar apps compared and reviewed

4.5 avg rating
9 free apps
Updated July 2026
RPN Calculator free
RPN Calculator free
Benjamin Pisano
📚 Education
🔧 Utilities

Whether you want more options like RPN Calculator free or a completely different take on the same concept, our curated list of 10+ similar apps has you covered. Updated for 2026 with the latest ratings and comparisons.

Top Alternatives to RPN Calculator free

RPN Calculator 48#1

RPN Calculator 48 by Tom Kerrigan

RPN Scientific Calculator
Editor's Choice
🔧 Utilities
4.8😊(216 ratings)
$3.99
RPN Calculator 48 screenshot 1
RPN Calculator 48 screenshot 2
RPN Calculator 48 screenshot 3
RPN Calculator 48 screenshot 4

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.

What We Love

  • 🚀 Excellent RPN implementation
  • 👍 Familiar and intuitive interface
  • 💡 Useful features for everyday calculations
  • 🚀 Reliable and stable performance

Room to Improve

  • 🐛 Lack of landscape mode support on iPad
  • 💡 Could use more advanced features like matrix operations
RLM-11CX#2

RLM-11CX by Ricardo Lira Matte

Scientific & Programable
Strong Contender
🔧 Utilities
3.1(7 ratings)
FreeIn-App Purchases
RLM-11CX screenshot 1
RLM-11CX screenshot 2
RLM-11CX screenshot 3
RLM-11CX screenshot 4
RLM-11CX screenshot 5
RLM-11CX screenshot 6

This app is a scientific and programmable calculator designed for science and engineering, replicating the functionality of the HP-11C. It offers extensive features for finance, business, statistics, complex numbers, and unit conversions, with a programmable interface for custom calculations.

HP-35#3

HP-35 by Enrique Haro

RPN Calculator. HP-35, 45, 21
Worth Considering
🔧 Utilities
5.0(5 ratings)
Free
HP-35 screenshot 1
HP-35 screenshot 2
HP-35 screenshot 3
HP-35 screenshot 4
HP-35 screenshot 5

Emulates classic Hewlett Packard RPN scientific calculators from the 1970s. Experience the original HP-35, HP-45, and HP-21 models on your iPhone.

More apps like RPN Calculator free

4
Free42
Free42
Free42
HP-42S Calculator Simulator
Free

This application is a faithful re-implementation of the HP-42S scientific calculator and its associated printer. It offers full functionality without requiring original HP ROM images and is an open-source project.

HP-42S calculator simulationHP-82240 printer simulationOpen source project
🔧 Utilities
(278)
free
5
PCalc Lite
PCalc Lite
PCalc Lite
The Best Calculator
Free

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.

Optional RPN modeMultiple undo and redoUnit conversions and constants
🔧 Utilities
(214)
free with in-app purchases
6
The Best Calculator - Calc Pro
The Best Calculator - Calc Pro
The Best Calculator - Calc Pro
10 Powerful Calculators
Free

This app offers a comprehensive suite of 10 powerful calculators and 10 financial worksheets, designed to handle everything from basic arithmetic to complex scientific and financial calculations. It includes features like unit conversion, currency exchange, graphing, and statistical analysis, making it a versatile tool for students and professionals.

10 powerful calculators (Standard, Scientific, Graphing, etc.)10 financial worksheets (Mortgage, Loan, Compound Interest, etc.)Unit Converter with 3000+ conversions
🔧 Utilities
(4.6K)
free with in-app purchases
7
RePNCalc - RPN Calculator Pro
RePNCalc - RPN Calculator Pro
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
(1)
free with in-app purchases
8
bcRPN
bcRPN
bcRPN
by Paul Wilkins
Free

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
(4)
free
9
Calccis
Calccis
Calccis
A RPN calculator
Free
🔧 Utilities
(0)
10
Complex RPN Calculator
Complex RPN Calculator
Complex RPN Calculator
Complex Numbers RPN Calculator
Free

This scientific calculator utilizes a four-level stack and natively handles complex numbers. It allows users to input and view numbers in both polar and rectangular formats, remembering its state and offering 10 memory locations.

Complex number supportFour-level stackPolar and rectangular formats
🔧 Utilities
(22)
free
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