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 81–100 of 1,000 ranked alternatives.

  1. Panecal Scientific Calculator app icon

    Panecal Scientific Calculator

    Noriyasu Kutsuzawa

    Enter formulas and check calculations

    Is a that lets users input and edit formulas with a live display. It supports formula reuse, variable memory, and cursor navigation for precise editing. Users can check formulas for errors and adjust values efficiently.

    ★ 4.81,952 ratingsUtilitiesFreeData updated 2026-09-08
  1. RPN-70 SD app icon

    RPN-70 SD

    Willy Kunz

    Simulate financial calculations

    Simulate the HP-70 financial calculator with loan amortization, saving plans, depreciation, and storage registers. View stack contents in popup windows. Perform financial calculations with enhanced accuracy and additional storage options.

    ★ 4.711 ratingsProductivityFreeData updated 2026-09-08
  2. Flip Clock Pro - time widgets app icon

    Flip Clock Pro - time widgets

    翠玲 施

    Display and date dynamically

    Display with seconds and date on a dynamic island. Switch between 12 and 24-hour formats. Set smart alarms that adjust volume automatically. Use multiple themes. Access timer, stopwatch, and countdown features.

    ★ 4.61,496 ratingsUtilities$2.99Data updated 2026-09-27
  3. Math Answer Scanner: Alphamath app icon

    Math Answer Scanner: Alphamath

    Math Alpha Education Inc

    Solve problems with a photo

    Solve problems by snapping photos and receiving instant answers with detailed explanations. Access a history log to review past problems. Get step-by-step solutions for algebra and other topics.

    ★ 4.3543 ratingsEducationFreeData updated 2026-09-06
  4. Calculator, basic and advanced app icon

    Calculator, basic and advanced

    Saren Inden

    Calculate, solve, and explore equations

    Perform calculations with a simple or interface. Solve equations step by step and view detailed explanations. Access calculation history for review or sharing. Generate graphs for visual representation of equations.

    ★ 4.678 ratingsUtilitiesFreeData updated 2026-09-17
  5. Calculator XLt app icon

    Calculator XLt

    Gero Mazza

    Calculate, convert, and compare values

    Perform calculations with a standard featuring extra-large buttons and functions like delete, x², √, and %. Use a scientific with 30 advanced functions. Convert units, calculate loans, and determine tips.

    ★ 4.7573 ratingsProductivityFreeData updated 2026-09-08
  6. RPN Calculus app icon

    RPN Calculus

    Thomas Braun

    Scientific RPN calculator for iPad.

    The app performs calculations with up to 15 digits of precision and supports a number range from -1E127 to 1E127. It includes a database of over 120 scientific constants that users can extend.

    ★ 4.01 ratingsUtilities$1.99Data updated 2026-09-14
  7. EduCalc Classic app icon

    EduCalc Classic

    William Jockusch

    Calculate and graph mathematical functions

    Perform complex calculations with a scientific calculator featuring arithmetic, exponentiation, roots, logarithms, factorials, permutations, combinations, and modulus. Graph functions and equations. Export results and share calculations.

    ★ 3.9303 ratingsEducationFreeData updated 2026-09-08
  8. Calculator SC-323PU app icon

    Calculator SC-323PU

    Thomas Oellinger

    Calculate, edit, and track equations

    The provides scientific calculations, unit conversion, and logic-based computations. Users can switch between modes. It includes a built-in manual for operation guidance. Perform n-base conversions and unit-based calculations.

    ★ 4.7118 ratingsUtilities$3.99Data updated 2026-09-08
  9. RPN-70 HD app icon

    RPN-70 HD

    Willy Kunz

    Simulate financial calculations with precision

    Simulates a financial calculator with loan amortization, saving plans, depreciation, and other financial calculations. Users can perform reverse Polish notation input, manage complex equations, and access detailed financial functions.

    ★ 5.03 ratingsProductivityFreeData updated 2026-09-08
  10. Digits Tape Calculator app icon

    Digits Tape Calculator

    Shift

    Edit numbers, track calculations, organize spreadsheets

    Allows users to perform calculations with an editable for error correction. Input numbers and operators, edit entries, and view results. Save and share calculation history. Switch between and spreadsheet modes for different tasks.

    ★ 4.81,126 ratingsUtilities$1.99Data updated 2026-09-08
  11. Scientific Calculator Premium app icon

    Scientific Calculator Premium

    Nixus Development

    Calculate, graph, and store equations

    Perform complex calculations with root, power, trigonometric, and logarithmic functions. Calculate factorials and double factorials. Draw graphs, use four memory blocks, insert constants, and make notes.

    ★ 4.5286 ratingsUtilitiesFreeData updated 2026-09-08
  12. Audio Spectrum Analyzer Pro app icon

    Audio Spectrum Analyzer Pro

    Vlad Polyanskiy

    Analyze and display FFT plots

    Analyze in real time with octave band and FFT plots. Display sound levels in decibels and noise ratings. Choose linear or logarithmic scales. Adjust window functions and track maximum values.

    ★ 4.4238 ratingsMusicFreeData updated 2026-09-11
  13. dB Meter & Spectrum Analyzer app icon

    dB Meter & Spectrum Analyzer

    Vlad Polyanskiy

    Measure sound levels and analyze frequencies

    Measure sound levels with a precision instrument featuring a . Calibrate against professional dB meters. Log noise data and set decibel thresholds. Display real-time sound level readings and frequency analysis.

    ★ 4.7865 ratingsUtilities$29.99Data updated 2026-09-08

How we rank alternatives

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