RPN-45 HD app icon

Apps Like RPN-45 HD for iPhone and iPad

Calculate like a scientific calculator

Simulate the HP-45 scientific calculator with photo-realistic visuals and animated keys. Perform all original functions and operations. Access a secret timer for 12-hour or 100-hour intervals. Switch to Super-45 mode for enhanced capabilities.

by Willy Kunz★ 4.86 ratingsProductivity$2.99Data updated 2026-09-08

RPN-45 HD screenshots

Ranked alternatives

Showing 21–40 of 1,000 ranked alternatives.

  1. GO-25 SciRPN app icon

    GO-25 SciRPN

    Steve Lidie

    Calculate with RPN and stack registers

    Simulates a programmable scientific calculator with RPN input. Features a 10-digit LED display, four stack registers, and ten storage registers. Includes math, trigonometric, and statistical functions.

    ★ 4.723 ratingsUtilities$4.99Data updated 2026-09-08
  2. Ncalc - Graphing Calculator 84 app icon

    Ncalc - Graphing Calculator 84

    Tran Duy

    Graph functions and trace curves

    Allows users to plot functions, polar, and parametric graphs. Users can edit equations in the graph editor and view graphs. Features include tracing, finding intersections and extrema, displaying derivatives, and adding tangents.

    ★ 4.65,015 ratingsEducationFreeData updated 2026-09-24
  3. Calculator HD Pro app icon

    Calculator HD Pro

    Cider Software LLC

    Calculate with dual-line display and multi-line input

    A with dual-line display showing input and result. Supports multi-line equations and tap-to-move cursor. Saves calculation history with timestamps and labels. Allows emailing calculations and swiping to review past entries.

    ★ 4.811,253 ratingsUtilities$9.99Data updated 2026-09-08
  1. MaxiCalc Free: Big Retro LCD Basic Desk Calculator app icon

    MaxiCalc Free: Big Retro LCD Basic Desk Calculator

    Fernando Sciessere

    A powerful calculator for all needs.

    The app offers two modes: portrait for basic calculations and landscape for scientific functions. Users can track entries with multiple tapes and use memory slots for complex calculations.

    ★ 4.7161 ratingsUtilitiesFreeData updated 2026-10-15
  2. RPN Calculator 48 app icon

    RPN Calculator 48

    Tom Kerrigan

    Calculate with swipe gestures and large buttons

    Perform calculations using reverse Polish notation. Swipe to undo or redo operations. Access a 100-entry stack and 6 memory buttons. View large, easy-to-read displays. Save state on exit. Supports scientific functions and multiple undo/redo levels.

    ★ 4.8242 ratingsUtilities$3.99Data updated 2026-09-08
  3. 15C Pro Scientific Calculator app icon

    15C Pro Scientific Calculator

    Vicinno Soft LLC

    Programmable scientific calculator for iPhone.

    The app provides complex number calculations, matrix operations, and root finding. It also performs numerical integration and supports hyperbolic and inverse hyperbolic trigonometric functions.

    ★ 3.8281 ratingsUtilities$5.99Data updated 2026-09-17
  4. Sci:Pro Calculator app icon

    Sci:Pro Calculator

    Jerry Montgomery

    Calculate, share, and switch modes

    Offers basic, scientific, and programmer modes with history views. Users can share results via email or copy-paste values between apps. The supports iPhone, iPad, and iPod Touch devices.

    ★ 4.83,858 ratingsUtilitiesFreeData updated 2026-09-08
  5. MathAce: Solve Study Question app icon

    MathAce: Solve Study Question

    精精 唐

    Math problems and track progress

    Math problems by taking a photo. Recognize equations, word problems, and geometry figures. Get step-by-step solutions and explanations. Track progress and review past problems. Share solutions via email or messaging.

    ★ 4.78,703 ratingsProductivityFreeData updated 2026-09-06
  6. OneCalc: All-in-one Calculator app icon

    OneCalc: All-in-one Calculator

    tasser gyati

    Calculate, convert, and solve equations

    Offers standard and advanced math functions including percent, negative sign, memory, brackets, and history. It includes trigonometry, roots, exponents, and logarithms.

    ★ 4.65,075 ratingsProductivityFreeData updated 2026-09-14
  7. Taculator 84 Graphing Calc app icon

    Taculator 84 Graphing Calc

    Di Venisco UG (haftungsbeschrankt)

    Graph functions and solve equations

    Solve math problems with capabilities. Input equations, view function graphs, and analyze statistical data. Perform calculations in algebra, calculus, and statistics. Navigate using arrow keys or touch gestures.

    ★ 4.57,571 ratingsEducationFreeData updated 2026-09-17
  8. RPN-35 SD app icon

    RPN-35 SD

    Willy Kunz

    Calculate, organize, and manage tasks

    Calculate mathematical expressions with scientific functions, trigonometry, and logarithms. Store and recall values. Adjust display settings for different modes. Export calculation history and share results via email or cloud storage.

    ★ 4.414 ratingsProductivity$1.99Data updated 2026-10-20
  9. RPN-67 NP app icon

    RPN-67 NP

    Willy Kunz

    Simulate HP-67 calculator functions

    Load and run 25 original programs from the HP-67 calculator. Perform calculations using reverse Polish notation. Access a wide range of mathematical and scientific functions. Store and retrieve programs using magnetic card simulation.

    ★ 4.04 ratingsProductivityFreeData updated 2026-09-08
  10. RPN-25 CE app icon

    RPN-25 CE

    Willy Kunz

    Calculate with photo-realistic precision

    Simulate the HP-25C calculator with input method. Perform complex calculations, store and recall values, and use programmable functions. Access continuous memory for data retention. View and edit programs directly on the interface.

    ★ 4.69 ratingsUtilities$2.99Data updated 2026-10-01
  11. Complex RPN Calculator app icon

    Complex RPN Calculator

    John Coddington

    Scientific RPN calculator with complex numbers.

    The app is a scientific RPN calculator. It has a four-level stack and complex numbers as its native number type.

    ★ 3.924 ratingsUtilitiesFreeData updated 2026-09-10
  12. MathMaster: Math Solver & Help app icon

    MathMaster: Math Solver & Help

    Appslux Media Limited

    Snap problems, get answers, see steps

    Take photos of problems or input equations to get instant solutions. View step-by-step explanations to understand solving methods. Correct answers and detailed breakdowns are provided for homework assistance.

    ★ 4.611,975 ratingsEducationFreeData updated 2026-09-06
  13. Calculator: Pro app icon

    Calculator: Pro

    Appgeneration, Software Technologies, Lda

    Calculate, convert, and solve equations

    MyCalc offers basic and scientific calculation functions. Users can switch between portrait and landscape modes. It supports currency and unit conversions. Results, equations, and conversions can be copied, shared, or saved.

    ★ 4.7584 ratingsProductivityFreeData updated 2026-10-12
  14. Solvo: AI Homework Helper app icon

    Solvo: AI Homework Helper

    AIBY Incorporated

    Solve math problems step by step

    Study flashcards with customizable questions and answers. Review progress with statistics and spaced repetition. Create and share flashcards with classmates. Solve math problems with step-by-step explanations.

    ★ 4.65,248 ratingsEducationFreeData updated 2026-09-06
  15. RPN-65 SD app icon

    RPN-65 SD

    Willy Kunz

    Simulate HP-65 calculator

    Simulate a programmable calculator with input. Run HP-65 programs, store and retrieve data from magnetic cards. View and edit calculator memory. Access historical documentation and user guides.

    ★ 5.08 ratingsProductivity$2.99Data updated 2026-10-16
  16. Class Calc Graphing Calculator app icon

    Class Calc Graphing Calculator

    Muskian Inc.

    Calculate stats, graphs, and matrices safely

    Perform statistical calculations, graph functions, and handle scientific and matrix operations. Access all features without ads or付费 restrictions. Replace physical calculators for test preparation and academic use.

    ★ 4.91,675 ratingsEducationFreeData updated 2026-09-13
  17. TechniCalc Calculator app icon

    TechniCalc Calculator

    Jacob Parker

    Calculate equations naturally and precisely

    Allows users to perform complex calculations with a natural equation entry system. It supports split screen, wireless keyboards, and Apple Watch integration. The displays full equations in real time and offers dark mode for enhanced readability.

    ★ 4.782 ratingsUtilities$7.99Data updated 2026-09-24

How we rank alternatives

Apps are ranked by functional similarity, category fit, rating confidence, and popularity.