Retro 15C app icon

Apps Like Retro 15C for iPhone and iPad

Calculate complex numbers and matrices

Perform complex number calculations and trigonometric functions. Handle matrix operations and numerical root finding. Calculate integrals and statistical values including linear regression. Write and execute custom programs. No ads or in- purchases.

by Greg Hewgill★ 4.3228 ratingsUtilitiesFreeData updated 2026-09-08

Retro 15C screenshots

Ranked alternatives

Showing 161–180 of 1,000 ranked alternatives.

  1. 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
  2. Calculate 84 AI app icon

    Calculate 84 AI

    Fredinax Tech LLC

    Solve equations and graph functions

    Solve mathematical equations with AI-powered step-by-step guidance. Graph functions and analyze results. Perform complex calculations and receive real-time explanations. Export solutions and share results. Sync with devices for continued use.

    ★ 4.626 ratingsEducationFreeData updated 2026-09-06
  1. Progressbar Calculator - Retro app icon

    Progressbar Calculator - Retro

    SH Limited

    Calculate and track progress with math precision

    Perform calculations with basic arithmetic operations. Input numbers and equations for quick results. Use a interface with nostalgic design elements. Adjust display settings for different calculation modes.

    ★ 4.428 ratingsUtilitiesFreeData updated 2026-11-06
  2. Master Bender Gold app icon

    Master Bender Gold

    PawEng, LLC

    Calculate bends, enter tools, bend accurately

    Calculate conduit bends with precise measurements and angle calculations. Input pipe dimensions and tool specifications. Generate bending templates and visualize the layout. Export data for use in projects.

    ★ 4.5441 ratingsProductivity$9.99Data updated 2026-11-09
  3. Cross Stitch Calculators app icon

    Cross Stitch Calculators

    Diana Białogrzywa

    Calculate fabric size and material needs

    Calculate fabric size in centimeters or inches based on count and fabric type. Determine thread consumption for specified stitches. Input project details to estimate material needs. Export calculations for reference.

    ★ 4.7320 ratingsLifestyleFreeData updated 2026-09-19
  4. MathU 12D Financial Calculator app icon

    MathU 12D Financial Calculator

    Creative Creek, LLC

    Financial calculator with RPN entry

    The app offers a financial calculator with RPN entry and functions matching the HP-12C. It features visible financial registers, a two-line display, and program lines showing function names for easier use.

    ★ 4.8115 ratingsFinance$4.99Data updated 2026-11-07
  5. iCalc Math app icon

    iCalc Math

    Dae-Hyeon Kim

    Calculate, solve, and analyze problems

    Perform complex calculations with memory, power, square root, logarithmic, and factorial functions. Access over 30 trigonometric functions and advanced scientific operations. Convert between decimal, binary, hexadecimal, and octal systems.

    ★ 1.01 ratingsEducationFreeData updated 2026-09-09
  6. CALC 1 Programmable Calculator app icon

    CALC 1 Programmable Calculator

    Roger Carey

    Create calculators with AI-generated functions

    Customize calculators for precise calculations. Create function calculators using AI-generated JavaScript code. Add functions to the list and test them before use. Perform complex computations with formulas.

    ★ 4.69 ratingsUtilities$9.99Data updated 2026-09-17
  7. DayCalc Pro - Note Calculator app icon

    DayCalc Pro - Note Calculator

    良峰 侯

    Calculate, convert, and share results

    Offers a standard, scientific, and fractions with over 30 scientific operations. Users can add notes to calculation history and share entries. It supports portrait and landscape modes on iPhone and iPad, and split-screen functionality.

    ★ 4.6177 ratingsUtilities$0.99Data updated 2026-09-08
  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 2026-10-29
  9. GRE Calculator app icon

    GRE Calculator

    Ahmad Najeeb

    Calculate with GRE-approved functions

    GRE test prep simulates the official Quantitative section . Perform arithmetic operations, use fraction functions, and access square roots. Practice with exam-like interface and restrictions. Solve equations and check calculations for accuracy.

    ★ 4.5375 ratingsEducationFreeData updated 2026-09-11
  10. EduCalc app icon

    EduCalc

    William Jockusch

    Solve equations and graph functions

    Scientific calculator allows complex equation solving, graphing in portrait and landscape modes, and polynomial root finding up to 10th degree. Adjust font sizes and graph line widths. Solve systems of equations and matrices.

    ★ 4.734 ratingsEducationFreeData updated 2026-09-10
  11. Fractions Pro app icon

    Fractions Pro

    Intemodino Group s.r.o.

    Calculate with fractions and decimals.

    The app performs mathematical, engineering, scientific, and technical calculations. It handles fractions, mixed numbers, decimals, and integers with various functions including trigonometric operations and constants.

    ★ 2.914 ratingsProductivity$6.99Data updated 2026-10-23
  12. CalcBox -All in One Calculator app icon

    CalcBox -All in One Calculator

    Realbyte Inc.

    Calculate, convert, and organize tasks

    Performs basic arithmetic and scientific calculations. Save equations and results for later. Unit Converter converts units for area, length, temperature, and more. Includes tools for currency exchange, date calculations, and percentage computations.

    ★ 4.8303 ratingsUtilitiesFreeData updated 2026-09-06
  13. Omega Calculator app icon

    Omega Calculator

    Joseph Rupertus

    Calculate, edit, and solve equations

    Allows users to perform basic arithmetic and advanced scientific calculations. It supports trigonometric functions, logarithms, and exponents. Users can switch between simple and complex modes. The features a clean interface and customizable themes.

    ★ 4.744 ratingsUtilitiesFreeData updated 2026-10-01
  14. GeoGebra CAS Calculator app icon

    GeoGebra CAS Calculator

    GeoGebra GmbH

    Solve equations and factor expressions

    Solve equations and expand expressions. Find derivatives and integrals. Work with undefined variables. Identify roots, minima, and maxima. Create tables of values. Perform regression analysis. Access free learning activities.

    ★ 4.014 ratingsEducationFreeData updated 2026-09-15
  15. DayCalc - Note Calculator app icon

    DayCalc - Note Calculator

    良峰 侯

    Calculate, convert, and share results

    Offers a standard, scientific, and fractions with over 30 scientific operations. Users can add notes to calculation history and share entries.

    ★ 4.7126 ratingsUtilitiesFreeData updated 2026-09-08

How we rank alternatives

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