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 141–160 of 1,000 ranked alternatives.

  1. Desmos Scientific Calculator app icon

    Desmos Scientific Calculator

    Desmos, Inc.

    Calculate, graph, and explore math functions

    Perform complex calculations with trigonometric, statistical, and combinatorial functions. Define and evaluate custom equations. Graph mathematical expressions and explore multiple variables. Save and reuse calculations for future use.

    ★ 4.3332 ratingsEducationFreeData updated 2026-09-12
  2. Calculator!! app icon

    Calculator!!

    Behzad Dogahe

    Calculate and track expressions

    Calculator displays calculations in real-time and saves a history accessible by swiping up. It handles fractions, converting between proper, improper, and mixed formats. It supports degrees, minutes, and seconds for angle input.

    ★ 4.456 ratingsUtilities$2.99Data updated 2026-09-08
  3. Ruler / Measuring Tape app icon

    Ruler / Measuring Tape

    Clafou Ltd

    Measure with your screen

    Measure objects using screen size, augmented reality, or printed rulers. Place virtual on surfaces with ARKit. Print rulers via AirPrint. Compare printed results with on-screen measurements. No ads, in- purchases, or tracking.

    ★ 4.4223 ratingsUtilitiesFreeData updated 2026-09-13
  1. WP 34s app icon

    WP 34s

    Pascal Meheut

    Calculate, program, and store equations

    Perform complex calculations using RPN input. Access programmer functions for base conversions and bitwise operations. Use fraction mode and probability distributions. Track time with a stopwatch. Store and retrieve custom programs.

    ★ 4.729 ratingsProductivityFreeData updated 2026-09-08
  2. Calc Pro HD - Top Calculator! app icon

    Calc Pro HD - Top Calculator!

    Panoramic Software Inc.

    Calculate, edit, and track financial data

    Perform complex calculations with 10 financial worksheets and 10 calculators. Switch between landscape and portrait modes. View results in decimal, fraction, or percentage formats. Save and recall previous calculations. Export data as text or PDF.

    ★ 4.7283 ratingsUtilities$7.99Data updated 2026-09-08
  3. Calculator· - Easy to Use app icon

    Calculator· - Easy to Use

    Netviking AB

    Calculate with big buttons and clear display

    A calculator with large buttons and a big display. Perform addition, subtraction, multiplication, and division. Features a Retina display for clear viewing.

    ★ 4.4219 ratingsUtilitiesFreeData updated 2026-09-09
  4. 15C Scientific Calculator app icon

    15C Scientific Calculator

    Vicinno Soft LLC

    Calculate with precise RPN math

    Emulates HP 15C RPN functionality with precise mathematical calculations. Users can solve equations, perform numerical integration, handle complex numbers, and execute matrix operations. It supports root finding and hyperbolic functions.

    ★ 0.00 ratingsUtilities$14.99Data updated 2026-09-08
  5. StitchBuddy HD app icon

    StitchBuddy HD

    Matthias Arndt

    Manage embroidery designs anywhere, anytime.

    The app provides machine embroidery design management on iPhone and iPad. Users can rotate, flip, move, resize, and modify designs, change thread colors, and synchronize with computers via iCloud.

    ★ 4.1292 ratingsProductivityFreeData updated 2026-09-29
  6. Halcyon Calc Lite app icon

    Halcyon Calc Lite

    Halcyon Touch Software

    Calculate and scroll through numbers

    Perform calculations with over 225 built-in operations including trigonometry, logarithms, complex functions, and real numbers. Scroll through the stack with finger gestures. Copy and paste results. Work with real and complex numbers.

    ★ 4.715 ratingsUtilitiesFreeData updated 2026-09-08
  7. Calca app icon

    Calca

    Krueger Systems, Inc.

    Calculate and write with math

    Solve equations and simplify expressions instantly as you type. Create and manipulate variables and functions with few keystrokes. Edit Markdown text to explain calculations and ideas. Share results and export calculations in various formats.

    ★ 4.5157 ratingsProductivity$9.99Data updated 2026-10-20
  8. Math AI - The Math Solver App app icon

    Math AI - The Math Solver App

    Jignesh Thakkar Huf

    Snap problems and get step-by-step solutions

    Solve problems by snapping photos. Receive step-by-step explanations and multiple solving methods. Access interactive graphs and a scientific calculator. View how-to animations for each solution.

    ★ 4.379 ratingsEducationFreeData updated 2026-09-06
  9. Math AI - AI Study Companion app icon

    Math AI - AI Study Companion

    INTSIG PTE. LTD.

    Solve problems with AI camera input

    Solve problems by typing or scanning with the camera. Receive step-by-step explanations for algebra, calculus, and graphing. Access detailed solutions for complex concepts.

    ★ 4.998 ratingsEducationFreeData updated 2026-09-06
  10. Damage Counter Master: PTCG app icon

    Damage Counter Master: PTCG

    issei nakanishi

    Tap to count

    Count with tap actions. Move cards via drag and drop. Toss coins for random results. Show GX card usage and special conditions. Undo last action. Include a chess clock for timing gameplay.

    ★ 4.560 ratingsUtilitiesFreeData updated 2026-09-15
  11. HP Prime Pro app icon

    HP Prime Pro

    MORAVIA Consulting, spol. s r.o.

    Solve math problems and explore graphs

    Solve equations and inequalities with advanced graphing. Trace functions and analyze intersections. Perform calculations, store variables, and use built-in math functions. Access a scientific calculator and explore interactive math concepts.

    ★ 3.281 ratingsEducation$24.99Data updated 2026-09-23
  12. DB40X app icon

    DB40X

    Christophe de Dinechin

    ★ 5.04 ratingsProductivityFreeData updated 2026-09-06
  13. Scientific Calculator Elite app icon

    Scientific Calculator Elite

    Cyberprodigy LLC

    Calculate with fractions and units

    ™ allows users to perform fraction calculations and convert between decimals and fractions. It supports degree, minute, and second conversions. Users can handle unit conversions and calculations with dimensional units.

    ★ 4.853 ratingsUtilities$4.99Data updated 2026-09-08

How we rank alternatives

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