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Best Hp 15C Calculator Apps

209+ iOS apps curated and reviewed

4.1 avg rating
13 free apps
Updated July 2026

Out of 209+ hp 15c calculator apps on iOS, 13 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top Hp 15C Calculator Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Retro 15CRetro 15CFree4.3★ (212)NoNoJul 2026
2HP 15c CalculatorHP 15c Calculator$14.994.8★ (205)NoNoAug 2026
315C Pro Scientific Calculator15C Pro Scientific Calculator$5.993.8★ (281)NoNoAug 2026
4RLM-15CXRLM-15CXFree4.3★ (13)NoYesJul 2026
5Calculator‰Calculator‰Free4.9★ (404K)YesNoAug 2026
6iHP48iHP48Free4.7★ (270)NoNoAug 2026
7Electrical Engineering - liteElectrical Engineering - liteFree4.7★ (248)YesYesJul 2026
8Vicinno Financial CalculatorVicinno Financial Calculator$5.994.2★ (1.2K)NoNoAug 2026

Top Picks for Hp 15C Calculator

Retro 15C#1

Retro 15C by Greg Hewgill

Editor's Choice
🔧 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
HP 15c Calculator#2

HP 15c Calculator by MORAVIA Consulting, spol. s r.o.

Official emulator of HP 15c
Strong Contender
🔧 Utilities
4.8😊(205 ratings)
$14.99
HP 15c Calculator screenshot 1
HP 15c Calculator screenshot 2
HP 15c Calculator screenshot 3
HP 15c Calculator screenshot 4

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.

What We Love

  • 🚀 Excellent emulation of original HP 15C
  • 👍 Faithful reproduction of classic calculator
  • 👍 Includes original manual
  • 👍 Works just like the real thing

Room to Improve

  • 🐛 Display issues in portrait mode
  • 🐛 Bugs with programming and trig functions
  • 🔇 Loud button click sound
15C Pro Scientific Calculator#3

15C Pro Scientific Calculator by Vicinno Soft LLC

HP 15C emulator
Worth Considering
🔧 Utilities
3.8😞(281 ratings)
$5.99
15C Pro Scientific Calculator screenshot 1
15C Pro Scientific Calculator screenshot 2
15C Pro Scientific Calculator screenshot 3
15C Pro Scientific Calculator screenshot 4
15C Pro Scientific Calculator screenshot 5

This app emulates the HP 15C scientific calculator, offering advanced functions like complex numbers, matrix operations, numerical integration, and root finding. It provides the same capabilities as the original hardware with enhanced performance for your mobile device.

What We Love

  • 🚀 Faithful emulation of original HP-15C
  • 👍 Works just like the real calculator
  • 💡 Convenient to have on phone
  • 🚀 Accurate calculations

Room to Improve

  • 🐛 Crashes on iOS 13 and later
  • 🐛 Orientation issues on some devices
  • 🐛 Occasional locking up

More Hp 15C Calculator apps to explore

4
RLM-15CX
RLM-15CX
RLM-15CX
Advance Scientific Calculator
Free

This advanced scientific calculator emulates the functionality of the HP-15C, offering comprehensive tools for finance, business, statistics, and scientific calculations. It supports programming, equation solving, and unit conversions, optimized for iOS devices.

Programmable advanced scientific calculatorFinance and business calculation menusStatistics and probability functions
📊 Productivity
(13)
free with in-app purchases
5
Calculator‰
Calculator‰
Calculator‰
Default Calculator
Free

This utility app offers a clean and intuitive interface for performing calculations. It prioritizes a user-friendly design with large buttons and a clear display for quick and efficient use.

Large buttonsClear displayFast calculations
🔧 Utilities
(404K)
ad-supported
6
iHP48
iHP48
iHP48
The classic HP48 improved
Free

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.

Supports HP38, HP39, HP48, HP49, HP50 calculatorsHaptic feedback and customizable zoom optionsSeamless file transfer via iTunes and Files app
📊 Productivity
(270)
free
7
Electrical Engineering - lite
Electrical Engineering - lite
Electrical Engineering - lite
60 calculations with circuits
Free

This app offers a comprehensive suite of electrical calculations and conversions for professionals and students. It handles diverse units and provides precise results for various electrical engineering tasks, including voltage, current, power, and more.

60 Electrical Calculators16 Electrical ConvertersVoltage, Current, Resistance, Power calculations
📚 Education
(248)
free with in-app purchases
8
Vicinno Financial Calculator
Vicinno Financial Calculator
Vicinno Financial Calculator
HP 12C emulator
$5.99

This app emulates the functionality of the HP 12C Financial Calculator, offering all its features and more for mobile devices. It provides a reliable and convenient way to perform complex financial calculations on the go.

HP 12C emulatorTime value of money (TVM)Cash flow analysis (NPV, IRR)
💰 Finance
(1.2K)
paid
9
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
10
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
(208)
free with in-app purchases
11
3 Day Blinds®
3 Day Blinds®
3 Day Blinds®
by 3 Day Blinds
Free

Effortlessly control motorized window shades with a tap or schedule automated movements. Manage light and privacy throughout your home with custom scenes and timers, even remotely.

Remote shade operationGroup shade controlCustom scene creation
🌟 Lifestyle
(9)
free
12
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
(325)
paid
13
Calculator with History Tape
Calculator with History Tape
Calculator with History Tape
No Ads Calculator with Memory
Free

This app provides a straightforward calculator experience with a comprehensive history log of all your computations. Customize the keyboard, display, and history records to suit your needs. Easily add annotations and titles to past calculations for better organization.

History record functionDisplay input equationAdjustable keyboard size and font
📊 Productivity
(3.2K)
free with in-app purchases
14
Calculator #
Calculator #
Calculator #
Scientific Calculator
Free

This multi-function calculator offers basic to advanced scientific and algebraic computations. It includes features like handwriting recognition, equation solvers, and 2D graphing, making it suitable for students and professionals. In-app purchases unlock advanced capabilities.

Math Photos SolverHandwriting RecognitionAI Math Problem Solver
🔧 Utilities
(36K)
free with in-app purchases
15
RHB TradeSmart ID
RHB TradeSmart ID
RHB TradeSmart ID
by PT RHB SEKURITAS INDONESIA
Free

This application simplifies stock trading with features like dynamic trading fees, margin account options with promotional interest rates, and a loyalty points system redeemable for e-wallet credit. It also offers tools for stock analysis, including technical signals and fundamental value analysis.

Dynamic trading fees based on transaction volumeMargin account opening with promotional interest ratesLoyalty points for transactions, redeemable for e-wallet credit
💰 Finance
(5)
free
16
Calculator ∞
Calculator ∞
Calculator ∞
The Best Scientific Calculator
$5.99

This advanced calculator app offers a powerful math core and algebra engine for basic to complex calculations. It includes features like step-by-step solutions, handwriting recognition, and 2D graphing, making it suitable for students, engineers, and programmers.

Step-by-step solution hintsMath Photos SolverHandwriting Recognition
📚 Education
(6.3K)
free with in-app purchases
17
11C Scientific Calculator
11C Scientific Calculator
11C Scientific Calculator
HP 11C emulator
$5.99

This app accurately emulates the classic HP 11C RPN scientific programmable calculator. It replicates the original's Reverse Polish Notation entry system and supports a wide range of mathematical functions, including advanced statistical and trigonometric operations.

RPN entry systemProgrammable functionsHyperbolic trig functions
🔧 Utilities
(298)
paid
18
Calculator Pro Lite
Calculator Pro Lite
Calculator Pro Lite
Best Calculator
Free

A highly customizable calculator app offering a modern interface and extensive features. Personalize themes, button layouts, and visual elements. Track your calculations with a detailed history and access scientific functions.

Customizable themes and colorsDual-line displayCalculation history
🔧 Utilities
(3K)
ad-supported
19
Calculator with History +
Calculator with History +
Calculator with History +
No ads & Scientific calculator
Free

This free calculator app offers a fast, ad-free experience with a visual input and calculation history. Customize your experience with various keyboard sounds and colors, and access advanced scientific functions when needed.

Ad-free experienceCalculation historyVisual input
💰 Finance
(25K)
free with in-app purchases
20
Panecal Scientific Calculator
Panecal Scientific Calculator
Panecal Scientific Calculator
For engineers and students
Free

This app functions as a scientific calculator, enabling users to input and edit complex formulas with ease. It supports formula history, variable memory, and various number system conversions for accurate calculations.

Formula editing with cursor and swipeReuse past formulasVariable memory for calculations
🔧 Utilities
(1.9K)
ad-supported

FAQ about Hp 15C Calculator

What are the best hp 15c calculator apps for iPhone?
Retro 15C tops our hp 15c calculator apps ranking as of July 2026, with a 4.3-star average from 212 App Store ratings, and it's free to download.
Yes — 13 of the top hp 15c calculator apps we rank are free to download, including Retro 15C and RLM-15CX.
Retro 15C has no ads and has no in-app purchases, according to its App Store listing as of July 2026.
We track 209+ hp 15c calculator apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
The Retro 15C app emulates a classic RPN (Reverse Polish Notation) scientific calculator. It offers a wide range of advanced mathematical functions, including complex number arithmetic, matrix calculations, numerical root finding, and integration.
Key features include complex number arithmetic and trig functions, matrix calculations, a numerical root finder, numerical integration, statistical functions with linear regression, and full programmability. It aims to replicate the functionality of classic 1980s RPN calculators.