Best RPN Calculator free alternatives: apps like RPN Calculator free

10+ similar apps compared and reviewed

4.4 avg rating
10 free apps
Updated October 2026

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

RePNCalc - RPN Calculator Pro#1

RePNCalc - RPN Calculator Pro by Michael Redig

Easy Reverse Polish Notation
Editor's Choice
🔧 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.

RPN#2

RPN by Tomas Stankiewicz Baldassarri

Simple RPN Calculator
Strong Contender
🔧 Utilities
0.0(0 ratings)
FreeIn-App Purchases
RPN screenshot 1
RPN screenshot 2
RPN screenshot 3

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.

bcRPN#3

bcRPN by Paul Wilkins

Worth Considering
🔧 Utilities
4.8(8 ratings)
Free
bcRPN screenshot 1

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.

More apps like RPN Calculator free

4
CP PLUS EVMS Pro+
CP PLUS EVMS Pro+
CP PLUS EVMS Pro+
EVMS Pro+
Free
🔧 Utilities
(0)
5
SwiftRPN
SwiftRPN
SwiftRPN
RPN At The Speed Of Light
Free

This utility app provides a powerful Reverse Polish Notation (RPN) calculator with advanced features. It supports scalar types, vectors, and matrices, along with extensive built-in operators and unit conversions. Easily switch between number bases and visualize results.

RPN stack for efficient calculationsSupport for scalar, vector, and matrix types84 built-in operators with documentation
🔧 Utilities
(1)
free
6
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
(24)
free
7
RLM-11CX
RLM-11CX
RLM-11CX
Scientific & Programable
Free

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.

Finance calculations (amortization, bond price, Black-Scholes)Business functions (break-even, currency exchange)Statistical analysis (regression, probability distributions)
🔧 Utilities
(7)
free with in-app purchases
8
HP-35
HP-35
HP-35
RPN Calculator. HP-35, 45, 21
Free

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

RPN calculator emulationHP-35 modelHP-45 model
🔧 Utilities
(62)
free
9
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
(287)
free
10
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