Emulates classic Hewlett Packard RPN scientific calculators from the 1970s. Experience the original HP-35, HP-45, and HP-21 models on your iPhone.
SwiftRPN by Patrick Gelvin
Editor's Choice
🔧 Utilities
0.0(0 ratings)
Free
Best apps like bcRPN
10+ similar apps compared and reviewed
4.4 avg rating
10 free apps
Updated July 2026
bcRPN is great, but it's not the only option. Explore 10+ similar apps for iPhone and iPad, each reviewed and rated by real users. Find free alternatives, premium upgrades, and hidden gems.
Top Alternatives to bcRPN
5.0(5 ratings)
Free
RePNCalc - RPN Calculator Pro by Michael Redig
Easy Reverse Polish NotationWorth Considering
🔧 Utilities
5.0(1 ratings)
FreeIn-App Purchases
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.
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4
ThetaCalc
by Felix Stehli
Free
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
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(4)
free5
Dozecal
Duodecimal calculator
Free
This educational calculator promotes the use of Base Twelve (duodecimal) in math and science. It offers standard mathematical functions in both duodecimal and decimal modes, with automatic conversion between them. It utilizes Reverse Polish Notation (RPN) for calculations.
Duodecimal and Decimal modesAutomatic mode conversionRPN (Reverse Polish Notation) input
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(4)
free6
Calccis
A RPN calculator
Free
🔧 Utilities
(0)
7
Halcyon Calc Lite
by Halcyon Touch Software
Free
This app is a powerful calculator for students and professionals, offering advanced features like symbolic expression manipulation, graphing, and statistical analysis. It supports real, complex, and integer numbers, matrices, and vectors, making it versatile for various mathematical tasks.
Symbolic expression manipulationGraphing of expressionsMatrix and vector calculations
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(15)
free with in-app purchases8
RLM-10CX
Scientific Calculator
Free
This scientific calculator offers a comprehensive suite of tools for finance, business, statistics, and complex scientific calculations. It emulates a classic calculator while leveraging modern iOS device capabilities for ease of use and advanced functions.
Finance and Business calculationsDate and Time interval calculationsAdvanced Statistics and Curve Fitting
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(1)
free9
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
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(22)
free10
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)
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(7)
free with in-app purchases