Best HP 15c Calculator alternatives: apps like HP 15c Calculator

10+ similar apps compared and reviewed

4.3 avg rating

5 free apps

Updated October 2026

HP 15c Calculator

MORAVIA Consulting, spol. s r.o.

HP 15c Calculator 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 HP 15c Calculator

#1

Plus42 by Thomas Okken

Enhanced HP-42S Calc Simulator

Editor's Choice

4.9(79 ratings)

$9.99

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This advanced scientific calculator simulates the classic HP-42S RPN calculator with enhanced features. It offers algebraic expressions, unit conversions, directories for storage, a larger resizable display, financial functions, and 2D plotting with integral and root finding.

#2

HP-35 by Enrique Haro

RPN Calculator. HP-35, 45, 21

Strong Contender

4.6(59 ratings)

Free

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

#3

HP15C: Scientific Calculator by FERMAVE

Classic Science Calc for you

Worth Considering

2.7(3 ratings)

$4.99

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Relive the classic computing experience with a vintage scientific calculator. This app emulates a beloved 90s model, offering a nostalgic and functional tool for calculations.

More apps like HP 15c Calculator

by Michael Doornbos

This app faithfully recreates the legendary HP 16C Computer Scientist calculator, offering advanced hex arithmetic, bit manipulation, and base conversion. It features RPN, keystroke programming, and modern enhancements like a two-line display and haptic feedback.

Full RPN calculatorInteger arithmetic (HEX, DEC, OCT, BIN)Configurable word size (1-64 bits)

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Scientific & Programable

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)

free with in-app purchases

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Highly popular 1975 calculator

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.

Photo-realistic simulationProgrammable (99/999 steps)15 user-defined function keys

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HP-42S Calculator Simulator

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

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Vintage Desktop Calculator

This app simulates a legendary 1970s programmable calculator, offering advanced features for scientists and engineers. It allows users to run programs, manage virtual cards, and access hundreds of free program cards from its website.

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

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The Best Calculator

A powerful calculator designed for professionals and students, offering advanced features like RPN mode, multi-line display, and extensive unit conversions. It supports various number systems and includes an Apple Watch app for on-the-go calculations.

Optional RPN modeMulti-line displayExtensive unit conversions

free with in-app purchases

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The Best Calculator

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

free with in-app purchases

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