This app is a photo-realistic simulation of the classic HP-25 scientific calculator. It offers advanced programming features, a vast function library, and modern enhancements for enhanced usability on iOS devices.
4.6(9 ratings)
$2.99
Best apps like RPN Calculator Pro
17+ similar apps compared and reviewed
4.2 avg rating
4 free apps
Updated July 2026
Looking for something like RPN Calculator Pro? We've analyzed 17+ 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 RPN Calculator Pro
GO-21 SciRPN by Steve Lidie
Strong Contender
đ§ Utilities
4.9(12 ratings)
$2.99
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.
RePNCalc - RPN Calculator Pro by Michael Redig
Easy Reverse Polish NotationWorth Considering
đ§ 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.
More apps like RPN Calculator Pro
4
My RPN Calc
by Laurent Rodier
$1.99
This scientific and financial calculator offers RPN input and a wide range of functions including complex numbers, equation solving, and statistical analysis. It also supports basic operations on Apple Watch.
RPN inputComplex number supportEquation solving (2nd-4th degree)
đ§ Utilities
(2)
paid5
Smart Battery 24V
Smart Battery 6Vă12Vă24V
Free
Monitor the voltage of up to four 6V, 12V, or 24V batteries simultaneously. Test startup and charging systems, and accurately record vehicle start and stop times. View all data on your phone via Bluetooth for easy vehicle battery management.
Monitor 6V, 12V, 24V batteriesSimultaneous monitoring of four batteriesTest startup and charging system voltage
đ§ Utilities
(1)
free6
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
đ§ Utilities
(1)
free7
GO-25 SciRPN
by Steve Lidie
$4.99
This app faithfully recreates the HP-25C Programmable Scientific Calculator from 1976. It offers RPN input, a 10-digit LED display, and extensive mathematical functions. Users can program it with up to 99 steps and share programs via various methods.
RPN input10-digit LED displayFour stack registers
đ§ Utilities
(23)
paid8
RPN Anywhere Lite
Bring RPN Calculator Anywhere
Free
A straightforward Reverse Polish Notation (RPN) calculator designed for both iPhone and Apple Watch. It offers essential calculator functions with intuitive gestures for input and stack management.
RPN calculator functionalityiPhone and Apple Watch appIntuitive gesture controls
đ§ Utilities
(3)
ad-supported9
RPN Scientific Calculator
by Nick Nallick
$0.99
This calculator app replicates the functionality of traditional HP scientific calculators for iOS devices. It offers a four-level stack, multiple display options, and BCD math for precise calculations. Features include a "paper" tape for recording calculations and ten memory storage locations.
Four-level stackBCD math for accuracyAudio button click feedback
đ§ Utilities
(2)
paid10
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
đ§ Utilities
(4)
free