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 61–80 of 1,000 ranked alternatives.

  1. 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
  2. HiPER Scientific Calculator app icon

    HiPER Scientific Calculator

    Jindrich Houska

    Calculate and solve complex equations

    With symbolic algebra, equation solving, and calculus functions. Supports fractions, repeating decimals, and high-precision numbers. Displays results as simplified expressions or numerical values.

    ★ 4.6182 ratingsUtilitiesFreeData updated 2026-09-06
  3. i41CX app icon

    i41CX

    Antonio Lagana

    Calculate with RPN and scientific functions

    Perform complex calculations using RPN input. Access a wide range of scientific and programming functions. Customize skins and adjust key feedback settings. Input and edit equations with precise control. Save and retrieve programs for repeated use.

    ★ 4.747 ratingsProductivity$7.99Data updated 2026-11-09
  1. Calculator Plus #1 app icon

    Calculator Plus #1

    DigitAlchemy LLC

    Review calculations and track

    Plus allows users to perform basic math operations including addition, subtraction, division, multiplication, squaring, and square root. It features large buttons, clear numerals, and horizontal mode for additional controls.

    ★ 4.85,043 ratingsUtilitiesFreeData updated 2026-09-08
  2. Math problem solver, photo app icon

    Math problem solver, photo

    Sergey Vladimirovich

    Study math homework easy and fast.

    The app offers tools for studying homework, including graphical curve sketching, solving various equation types like exponential and trigonometric, and simplifying fractions. It also handles integrals, polynomials, and systems of equations.

    ★ 3.4554 ratingsEducationFreeData updated 2026-11-03
  3. Sporty's E6B Flight Computer app icon

    Sporty's E6B Flight Computer

    Sporty's Pilot Shop

    Calculate data and track position

    Calculate -related conversions, fuel consumption, and navigation metrics. Perform arithmetic operations and unit conversions. Track time, distance, and speed. Sync with Apple Watch for real-time updates.

    ★ 4.95,385 ratingsNavigation$9.99Data updated 2026-11-09
  4. Calculator ∞ app icon

    Calculator ∞

    An Truong

    Calculate, graph, and solve equations

    Solve equations, perform algebraic calculations, and graph functions. Support for multiple models including TI-83, TI-84, TI-89, Casio FX, and Sharp EL. Includes a scientific , fraction simplifier, and unit converter.

    ★ 4.76,388 ratingsEducation$5.99Data updated 2026-10-26
  5. Halcyon Calc app icon

    Halcyon Calc

    Halcyon Touch Software

    Calculate and solve equations

    Perform complex calculations with support for real and complex numbers. Manipulate symbolic expressions and use over 225 built-in functions. Scroll through results with finger gestures. Copy and paste data for easy sharing.

    ★ 4.918 ratingsUtilities$4.99Data updated 2026-09-08
  6. Calculation! app icon

    Calculation!

    Paul Koomey

    Calculate, copy, and share expressions

    Calculation allows users to perform scientific computations with trigonometric and inverse trigonometric functions. Users can toggle between degree and radian modes. Expressions and results can be copied with a double tap.

    ★ 5.088 ratingsUtilitiesFreeData updated 2026-09-06
  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. Fractio app icon

    Fractio

    James Campbell

    Calculate numbers in natural format.

    The app calculates linear measurements, areas, volumes, and weights in US and metric units. It supports decimal or fractional notation and includes unit conversion, memory, rounding, and percentage functions.

    ★ 3.211 ratingsUtilitiesFreeData updated 2026-10-21
  9. Calzy app icon

    Calzy

    Raja Vijayaraman

    Calculate, edit, and organize equations

    Perform calculations with a clean interface. Store and reuse numbers using the Memory Area. Bookmark equations for quick access. Drag and drop values between calculations. Switch between scientific and basic modes. Export results as text or image.

    ★ 4.71,942 ratingsProductivity$1.99Data updated 2026-11-09
  10. Calculator for iPad + app icon

    Calculator for iPad +

    Beijing Free Calculator Technology Co., Ltd.

    Calculate, edit, and manage numbers

    Manage calculations with advanced functions, customizable themes, and unit conversions. Save frequently used equations. Export results as PDF or image. Access additional tools via in- purchases.

    ★ 4.33,616 ratingsLifestyleFreeData updated 2026-09-13
  11. 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
  12. Math AI: Study Companion app icon

    Math AI: Study Companion

    Peter Jones

    Solve equations and calculate results

    Solve basic problems with a user-friendly . Handle complex equations with functions. Perform calculations, graph functions, and convert units. Store frequently used formulas for quick access.

    ★ 4.21,448 ratingsUtilitiesFreeData updated 2026-09-18
  13. 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
  14. Simple Calculator. + app icon

    Simple Calculator. +

    tasser gyati

    Calculate taxes and percentages

    Perform arithmetic calculations with 12 digits. Calculate tax, percentages, and cost, selling price, and gross margin. Use memory functions, square root, and sign change. Track grand total.

    ★ 4.7147 ratingsUtilities$1.99Data updated 2026-09-14
  15. 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
  16. Calculator RPN app icon

    Calculator RPN

    Benjamin Pisano

    Calculate with RPN and scientific functions

    Perform complex calculations with scientific functions and RPN mode for efficient input. Access 54 math functions including logarithms, square roots, factorials, trigonometry, and coordinate conversions.

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

How we rank alternatives

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