Best RPN 28x Calc alternatives: apps like RPN 28x Calc

Whether you want more options like RPN 28x Calc 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.

KobCard by KOB MARKETING

Gift Card Information Platform

4.1(377 ratings)

Free

KobCard is a comprehensive gift card information platform that offers real-time exchange rates, price calculations, and the latest news on gift cards. It serves as a one-stop destination for individuals looking to buy, sell, or stay informed about the world of gift cards.

Top Alternatives to RPN 28x Calc

DB50X by Christophe de Dinechin

Color version of DB48X

Editor's Choice

5.0(9 ratings)

$9.99

This scientific calculator offers high-precision computations with arbitrary precision for numbers. It supports advanced functions like complex numbers, matrices, symbolic calculations, and graphing, with a user-friendly interface and extensive built-in help.

RPN-34 CE by CuVee Software

Legendary classic calculator

Strong Contender

5.0(14 ratings)

$1.99

This app simulates a legendary scientific calculator, offering photo-realistic visuals and advanced functions like integration and root finding. It includes built-in programs and extensions for enhanced usability, making it a powerful tool for complex calculations.

RPN-65 SD by CuVee Software

First programmable calculator!

Worth Considering

Spirit of the HP48, revived

5.0(8 ratings)

$2.99

Experience a faithful simulation of the groundbreaking HP-65 programmable calculator on your iPhone. This app offers virtual program and data cards, a paper tape printer, and a robust card manager. Explore four distinct operating modes, including an enhanced "Super-65" option.

More apps like RPN 28x Calc

DB48X

$4.99

This advanced scientific calculator offers arbitrary precision computations, RPN and algebraic operations, and extensive graphing capabilities. It supports complex numbers, matrices, symbolic calculations, and over 1000 built-in functions, inspired by the HP48 series.

Arbitrary precision computationsRPN and algebraic operationsComplex numbers, vectors, and matrices

(6)

Classic HP Calculator w/Timer

RPN-55 SD

$1.99

This app is a photo-realistic simulation of a classic Hewlett-Packard programmable scientific calculator from the 1970s. It includes a 100-hour digital timer, clock functions, and original HP programs.

Photo-realistic look-and-feelProgrammable with conditional branching100-hr timer and 12/24-hr clock

(8)

Vintage Programmable Calc

RPN-67 Pro

$4.99

This app is a faithful simulation of a legendary 1970s programmable calculator, offering advanced features for scientists and engineers. It allows users to run existing programs, manage virtual program cards, and even print listings, all on their iPad.

Virtual program and data cardsVirtual paper tape printerDatabase-driven card manager

(6)

RPN scientific calculator emulationRich function setSimplified, less cluttered keyboard

WP 31s

by Pascal Meheut

Free

This app emulates a classic RPN scientific calculator, offering a rich function set for daily use with a simplified interface. It's based on the more complex WP 34s but is designed for easier operation.

(15)

free

RPN Calc with Printer and CAS

i41CX+

$24.99

This advanced RPN scientific calculator offers workstation-class Computer Algebra System (CAS) capabilities, going beyond traditional replicas. It provides access to an extensive library of modules and programs, enhanced with iOS features, customizable skins, and iCloud support for seamless data management.

RPN logic with 4-element stackExtensive memory registersOver 400 built-in functions

(108)

Vintage Calculator (1973)

Vintage-45

$0.99

This app meticulously recreates the functionality and appearance of a 1973 scientific calculator. It offers a photo-realistic interface with animated keys and includes all original functions, plus a "secret" stopwatch. Users can choose between full-speed or simulated original processing speeds.

Photo-realistic HP-45 designAnimated keys with sound feedbackFull HP-45 function implementation

(19)

Vintage Calculator (1973)

RPN-45 SD

$1.99

This app is a detailed simulation of a 1973 scientific calculator, offering a photorealistic interface and all original functions. It includes powerful enhancements for modern use, such as complex number support and advanced date calculations.

Photorealistic calculator simulationFull HP-45 function implementationComplex number support

(15)