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 1–20 of 1,000 ranked alternatives.

  1. 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
  2. 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
  3. HP 15c Calculator app icon

    HP 15c Calculator

    MORAVIA Consulting, spol. s r.o.

    Calculate with precision and reliability

    Perform complex calculations using RPN input. Access advanced mathematical functions and programming capabilities. Store and recall values with memory registers. Use a redesigned interface for enhanced usability.

    ★ 4.8212 ratingsUtilities$14.99Data updated 2026-09-14
  1. Graphing Calculator X84 app icon

    Graphing Calculator X84

    An Truong

    Calculate and graph mathematical expressions

    Solve equations and graph functions with advanced math support. Perform calculus operations and matrix calculations. Customize settings for precision. Access detailed tutorials and a comprehensive user manual.

    ★ 4.549,990 ratingsEducationFreeData updated 2026-09-13
  2. Calculator app icon

    Calculator

    The App Tower Inc.

    Calculate with 80 themes to choose

    A with customizable themes allows users to select from multiple visual styles. Perform basic and advanced calculations. Switch between light and dark modes. Adjust font size and color schemes.

    ★ 4.5146,123 ratingsUtilitiesFreeData updated 2026-09-08
  3. 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
  4. Calculator₊ app icon

    Calculator₊

    Impala Studios B.V.

    Calculate, edit, and track equations

    Perform basic arithmetic operations including addition, subtraction, multiplication, and division. Access scientific functions for advanced calculations. Convert units between different measurement systems.

    ★ 4.71,729,318 ratingsUtilitiesFreeData updated 2026-09-08
  5. Calculator - Pad Edition app icon

    Calculator - Pad Edition

    Ratha Sou

    Calculate in portrait, science in landscape

    Perform basic calculations in portrait mode and scientific calculations in landscape. Use root, power, factorial, exponential, division, logarithm, and trigonometric functions. Features a flat UI design similar to built-in iOS apps.

    ★ 4.7357,788 ratingsUtilitiesFreeData updated 2026-09-08
  6. 11C Scientific Calculator app icon

    11C Scientific Calculator

    Vicinno Soft LLC

    Calculate with RPN and functions

    Perform complex calculations using RPN entry system. Access hyperbolic and inverse hyperbolic trig functions. Calculate probability, factorials, and percentages. Support absolute, integer, and fractional values. Generate random numbers.

    ★ 4.2298 ratingsUtilities$5.99Data updated 2026-09-08
  7. Calculator with History + app icon

    Calculator with History +

    Beijing Free Calculator Technology Co., Ltd.

    Calculate and track financial formulas

    Perform calculations a scientific featuring pi, exponents, square root, negative numbers, and logarithms. View calculation and adjust decimal places or use thousands separators. Customize keyboard colors and sounds.

    ★ 4.725,089 ratingsFinanceFreeData updated 2026-09-17
  8. Graphing Calculator Plus AI app icon

    Graphing Calculator Plus AI

    An Truong

    Calculate, graph, and solve equations

    Solve equations and graph functions with advanced math support. Perform calculus operations and matrix calculations. Access detailed tutorials and a comprehensive user manual. Export results and share calculations.

    ★ 4.612,032 ratingsEducation$5.99Data updated 2026-09-19
  9. Calc-50 app icon

    Calc-50

    David Smith

    Calculate with high-precision math functions

    Perform complex calculations with high-precision math functions including trigonometric, hyperbolic, and special functions. Calculate derivatives, integrals, and roots. Program custom functions and store equations.

    ★ 3.73 ratingsProductivityFreeData updated 2026-09-12
  10. SFX Calc app icon

    SFX Calc

    Wai Kwong Lee

    Calculate with constants and memory

    SFX- performs basic arithmetic operations and allows calculations with a fixed constant. It includes non-volatile and volatile memory storage. It supports fraction and percentage calculations, linear regression, and statistical functions.

    ★ 4.7137 ratingsUtilitiesFreeData updated 2026-09-06
  11. Construction Master Pro Calc app icon

    Construction Master Pro Calc

    Calculated Industries, Inc.

    Try before you buy

    Calculate measurements and perform unit conversions for projects. Perform trigonometric calculations and angle measurements. Access a full user guide and use built-in formulas for precise calculations.

    ★ 4.839,684 ratingsUtilitiesFreeData updated 2026-09-08
  12. The Best Calculator - Calc Pro app icon

    The Best Calculator - Calc Pro

    Panoramic Software Inc.

    Calculate and manage financial data

    Perform complex calculations using 10 built-in calculators including scientific, financial, and unit conversion tools. Access 10 financial worksheets for budgeting, loans, and investments. Save and share calculation results.

    ★ 4.64,713 ratingsUtilitiesFreeData updated 2026-09-08
  13. Calculator for iPad₊ app icon

    Calculator for iPad₊

    Impala Studios B.V.

    Calculate and share equations instantly

    Perform complex mathematical calculations using scientific functions and simple arithmetic. Calculate percentages, taxes, and financial figures. Save and share results with others. Syncs with iPad and iPhone.

    ★ 4.5126,019 ratingsUtilitiesFreeData updated 2026-09-11
  14. Calculator⁼ app icon

    Calculator⁼

    Impala Studios B.V.

    Calculate, edit, and track results

    Calculator provides basic and scientific calculation functions. Users can access a history of past calculations for review or reuse. It includes a live currency converter for exchange rate checks.

    ★ 4.6358,634 ratingsUtilitiesFreeData updated 2026-09-08
  15. Basic Calculator+ app icon

    Basic Calculator+

    Christie Clark

    Calculate with large buttons and clear display

    A calculator with a clear display and large buttons supports functions. Switch between portrait and landscape modes on iPad. Perform simple calculations without additional features.

    ★ 4.9258,702 ratingsUtilitiesFreeData updated 2026-09-08
  16. RPN-34 CE app icon

    RPN-34 CE

    Willy Kunz

    Simulate HP-34C calculator

    Simulate the HP-34C calculator with photo-realistic graphics. Perform integration and root finding calculations. Access extended functions and improved speed. Navigate using on-screen buttons and keyboard input. Save and recall values.

    ★ 5.014 ratingsProductivity$1.99Data updated 2026-09-16
  17. Calc Pro HD – iPad Calculator app icon

    Calc Pro HD – iPad Calculator

    Panoramic Software Inc.

    Calculate, edit, and track finances

    Perform complex calculations with scientific, financial, and unit conversion tools. Access 10 financial worksheets for budgeting and planning. Switch between landscape and portrait modes. Save and export calculation results.

    ★ 4.71,468 ratingsUtilitiesFreeData updated 2026-09-08

How we rank alternatives

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