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Best Hp Calculator Apps

217+ iOS apps curated and reviewed

4.4 avg rating
13 free apps
Updated June 2026

Looking for free hp calculator apps? 13 of our 217+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Top Picks for Hp Calculator

iHP48#1

iHP48 by Alexis Lorca

The classic HP48 improved
Editor's Choice
📊 Productivity
4.7😊(270 ratings)
Free
iHP48 screenshot 1
iHP48 screenshot 2
iHP48 screenshot 3
iHP48 screenshot 4
iHP48 screenshot 5

This app brings the powerful HP48 calculator experience to your mobile device. It offers enhanced performance, seamless file management, and a customizable interface with support for various HP calculator models. Enjoy a familiar and convenient calculator solution without needing extra hardware.

What We Love

  • 🚀 Excellent emulation of HP48
  • 👍 Familiar and nostalgic feel
  • 👍 Comprehensive functionality
  • 👍 Customizable skins

Room to Improve

  • 🐛 Occasional crashes or freezes
  • 🐛 Missed keystrokes when typing quickly
  • 🐛 Blank or flickering display
Retro 15C#2

Retro 15C by Greg Hewgill

Strong Contender
🔧 Utilities
4.3😊(212 ratings)
Free
Retro 15C screenshot 1
Retro 15C screenshot 2

This app emulates a classic RPN scientific calculator, offering advanced features like complex number arithmetic, matrix calculations, and programmability. It provides a functional and complex tool reminiscent of 1980s calculators.

What We Love

  • 🚀 Lightning-fast calculator
  • 👍 Authentic look and feel of HP 15C
  • 🚀 Faster than real HP 15C
  • 👍 Excellent RPN emulation

Room to Improve

  • 🐛 Doesn't save settings, programs, or memory
  • 🐛 No key press feedback or sound
  • 🐛 Blinking display issue with large calculations
Free42#3

Free42 by Thomas Okken

HP-42S Calculator Simulator
Worth Considering
🔧 Utilities
4.8😊(278 ratings)
Free
Free42 screenshot 1
Free42 screenshot 2
Free42 screenshot 3

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.

What We Love

  • 🚀 Faithful reproduction of HP42S
  • 👍 Identical to physical calculator
  • 👍 Runs all original programs
  • 👍 Convenient to have on phone

Room to Improve

  • 🐛 Screen not filling entire display on newer devices
  • 🔇 Configurable key click sound missing
  • 🔇 Lack of loud click sound feedback

More Hp Calculator apps to explore

4
i48
i48
i48
by Automagic Software Pty Ltd
Free

This application emulates the HP48GX calculator on your iPhone or iPod touch. It allows you to perform complex calculations like matrix operations and function integration on the go.

HP48GX calculator emulationMatrix calculationsFunction integration
📊 Productivity
(196)
paid
5
HP 15c Calculator
HP 15c Calculator
HP 15c Calculator
Official emulator of HP 15c
$14.99

Experience the official emulator of the legendary HP 15c scientific calculator. This app offers a redesigned interface and modern look while preserving the precision and reliability of the original. It features RPN input, matrix calculations, complex functions, and numerical integration for professionals and students.

Official HP 15c emulatorRPN (Reverse Polish Notation)Matrix calculations
🔧 Utilities
(168)
paid
6
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
(5)
free
7
HP Prime Lite
HP Prime Lite
HP Prime Lite
Lite Graphing Calculator
Free

This app provides advanced graphing calculator functionality on your mobile device. It offers features for solving equations, exploring mathematical concepts, and is ideal for students in secondary and collegiate math courses. Enjoy a familiar layout with powerful tools for problem-solving.

Advanced graphing of equations and inequalitiesSolve single and systems of equationsHundreds of mathematical functions
📚 Education
(40)
free
8
Touch RPN calc
Touch RPN calc
Touch RPN calc
Financial/Sci RPN calculator
Free

This app offers a powerful RPN calculator with financial and scientific functions, mimicking popular industry-standard models. It includes programming capabilities and expandable flavors for diverse calculation needs.

RPN financial calculatorRPN scientific calculatorProgramming functions
💰 Finance
(207)
free with in-app purchases
9
my41CX
my41CX
my41CX
HP-41 Microcode Emulator
Free

Experience the most accurate HP-41CX calculator emulation. This app provides full microcode-level emulation of the original NUT processor, ensuring 100% hardware-accurate behavior. It features a modern interface, expandable ROM modules, and built-in documentation for a classic yet contemporary user experience.

True microcode emulationModern user interfaceExpandable with ROM modules
🔧 Utilities
(2)
free with in-app purchases
10
HP15C: Scientific Calculator
HP15C: Scientific Calculator
HP15C: Scientific Calculator
Classic Science Calc for you
$4.99

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.

Vintage scientific calculator emulationClassic 90s designFunctional for scientific calculations
🔧 Utilities
(3)
paid
11
HP 12c Financial Calculator
HP 12c Financial Calculator
HP 12c Financial Calculator
by MORAVIA Consulting, spol. s r.o.
$14.99

This app emulates the legendary HP 12c financial calculator with a redesigned interface and modern look. It preserves the precision and reliability trusted by professionals, offering built-in financial tools for business, banking, real estate, and education.

Official HP 12c emulatorIdentical algorithms and layoutRPN input
💰 Finance
(277)
paid
12
DB40X
DB40X
DB40X
High-precision RPL calculator
Free

A high-precision scientific calculator inspired by the HP48 series, offering arbitrary precision computations, complex numbers, vectors, matrices, and graphing. It supports RPN and algebraic operations, with over 1000 built-in functions and a hyperlinked help system.

Arbitrary precision computationsRPN and algebraic operationsComplex numbers, vectors, and matrices
📊 Productivity
(7)
free
13
Calculator - Pad Edition
Calculator - Pad Edition
Calculator - Pad Edition
Fulfill the missing calculator
Free

This app provides a comprehensive calculator experience, filling the gap for a built-in option on iPads. It offers basic, scientific, fraction, programmer, and tip calculations, along with unit and currency conversion. The interface is designed with a modern flat UI, supporting various orientations and multitasking features.

Basic and scientific calculationsFraction and programmer calculatorsUnit and currency converter
🔧 Utilities
(353K)
free with in-app purchases
14
10bii Financial Calculator
10bii Financial Calculator
10bii Financial Calculator
Easy Financial Calculator
$7.99

This app offers a comprehensive financial calculator with over 105 functions for business, statistics, and general math. It simplifies complex calculations like loan payments, time value of money, and investment analysis with an intuitive interface and visual tools. Easy modes are available for users new to financial calculations.

Over 105 financial, business, and math functionsTime Value of Money (TVM) calculationsUneven Cashflow worksheets
💰 Finance
(663)
free with in-app purchases
15
10BII Calc HD
10BII Calc HD
10BII Calc HD
by Ernest Brock
$8.99

This advanced calculator offers over 100 functions for business, finance, math, and statistics. It simplifies complex calculations like loans, cash flows, and depreciation with an intuitive interface and specialized worksheets. Includes interactive graphs and an audit tape for tracking all computations.

Over 100 business, finance, math, and statistics functionsTime Value of Money calculations with TVM solverCash flow analysis with dedicated editor
💰 Finance
(3.5K)
paid
16
R47 RPN Calculator
R47 RPN Calculator
R47 RPN Calculator
HP Program Editor & Tutorials
Free

This scientific calculator uses Reverse Polish Notation (RPN) to help you break down complex problems. It offers a full 47-series instruction set with advanced functions and a program editor. The free version includes extensive tutorials and documentation.

RPN scientific calculator47-series instruction setProgram editor
📚 Education
(19)
freemium
17
RLM-17BX
RLM-17BX
RLM-17BX
Finance & Science calculator
Free

This app offers a comprehensive suite of calculators for finance, business, science, and general use. It includes specialized worksheets for loans, investments, statistics, and complex mathematical functions, designed to leverage iOS device capabilities.

Finance worksheets (amortization, bond pricing, options)Business calculations (bill split, break-even, currency)Statistical analysis (probability, regressions)
📊 Productivity
(8)
free with in-app purchases
18
RLM-12CX
RLM-12CX
RLM-12CX
Finance & Business Calculator
Free

This app is a powerful financial and business calculator designed for iOS devices, replicating the functionality of the HP-12C with expanded features. It offers comprehensive tools for finance, business calculations, statistics, scientific functions, and unit conversions.

Finance and business calculationsAmortization schedulesBond price and yield calculations
💰 Finance
(18)
free with in-app purchases
19
RPN-55 SD
RPN-55 SD
RPN-55 SD
Classic HP Calculator w/Timer
$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
📊 Productivity
(8)
paid
20
i41CX
i41CX
i41CX
RPN Calc
$7.99

This app offers a powerful RPN scientific calculator experience, functionally equivalent to a renowned model. It provides extensive memory registers, over 300 built-in functions, and programmability. Advanced features can be unlocked via in-app purchases.

RPN logic with 4-element stack319 main and 124 extended memory registersOver 300 built-in functions
📊 Productivity
(43)
free with in-app purchases

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