Best apps like HP-35

10+ similar apps compared and reviewed

4.4 avg rating
7 free apps
Updated October 2026

Looking for something like HP? We've analyzed 10+ 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 HP

Free42#2

Free42 by Thomas Okken

HP-42S Calculator Simulator
Strong Contender
🔧 Utilities
4.8😊(283 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
  • 👍 Haptic feedback on button presses
  • 👍 Customizable skins
  • 👍 Actively maintained and updated

Room to Improve

  • 🐛 Screen not filling entire display on newer devices
  • 🔇 Configurable key click sound missing
  • 🔇 Lack of loud click sound feedback
Plus42#3

Plus42 by Thomas Okken

Enhanced HP-42S Calc Simulator
Worth Considering
🔧 Utilities
4.9(79 ratings)
$9.99
Plus42 screenshot 1
Plus42 screenshot 2
Plus42 screenshot 3
Plus42 screenshot 4
Plus42 screenshot 5
Plus42 screenshot 6

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.

More apps like HP

4
bcRPN
bcRPN
bcRPN
by Paul Wilkins
Free

This utility app functions as a Reverse Polish Notation calculator. It handles complex numbers and utilizes extended precision for all calculations, offering an unlimited stack depth and an undo feature for up to 10 operations.

Reverse Polish Notation (RPN) inputComplex number calculationsExtended precision math
🔧 Utilities
(4)
free
5
RLM-11CX
RLM-11CX
RLM-11CX
Scientific & Programable
Free

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)
🔧 Utilities
(7)
free with in-app purchases
6
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
(1)
free with in-app purchases
7
RCL-57
RCL-57
RCL-57
by Paul Novaes
Free

This app faithfully recreates the TI-57 programmable calculator, offering its full scientific functions and programming capabilities. It includes a user manual, sample programs, and features like turbo speed and alphanumeric display.

TI-57 recreationScientific functionsProgramming capabilities
🔧 Utilities
(0)
free
8
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
(207)
paid
9
RLM-10CX
RLM-10CX
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
🔧 Utilities
(1)
free
10
ThetaCalc
ThetaCalc
ThetaCalc
by Felix Stehli
Free

This utility app provides a Reverse Polish Notation (RPN) calculator. Users can extend its functionality by programming custom functions and equations using JavaScript.

Reverse Polish Notation (RPN) calculatorUser-programmable functionsJavaScript equation support
🔧 Utilities
(4)
free