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 41–60 of 1,000 ranked alternatives.

  1. GO-25 SciRPN app icon

    GO-25 SciRPN

    Steve Lidie

    Calculate with RPN and stack registers

    Simulates a programmable scientific calculator with RPN input. Features a 10-digit LED display, four stack registers, and ten storage registers. Includes math, trigonometric, and statistical functions.

    ★ 4.723 ratingsUtilities$4.99Data updated 2026-09-08
  2. TI-Nspire™ CAS app icon

    TI-Nspire™ CAS

    Texas Instruments

    Solve equations and graph functions

    Solve equations and perform algebraic manipulations. Graph functions and analyze data. Enter and analyze statistical models. Calculate derivatives and integrals. Export results and share solutions.

    ★ 4.6406 ratingsEducation$29.99Data updated 2026-09-08
  3. 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
  1. Calc Pro - The Top Calculator app icon

    Calc Pro - The Top Calculator

    Panoramic Software Inc.

    Calculate and manage your finances

    Perform complex calculations using ten built-in calculators. Access ten financial worksheets for budgeting, loans, and investments. Input formulas, view results, and save calculations. Export data as PDF or text. Switch between light and dark modes.

    ★ 4.7358 ratingsUtilities$7.99Data updated 2026-09-08
  2. TechniCalc Calculator app icon

    TechniCalc Calculator

    Jacob Parker

    Calculate equations naturally and precisely

    Allows users to perform complex calculations with a natural equation entry system. It supports split screen, wireless keyboards, and Apple Watch integration. The displays full equations in real time and offers dark mode for enhanced readability.

    ★ 4.782 ratingsUtilities$7.99Data updated 2026-09-24
  3. 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
  4. EZ Calculator 2021 app icon

    EZ Calculator 2021

    Corntree tech Co.Ltd

    Calculate, edit, and track numbers

    Allows users to perform basic and scientific calculations. It supports arithmetic operations, square roots, percentages, and trigonometric functions. Users can edit expressions with a movable cursor and view calculation history.

    ★ 4.8230 ratingsUtilitiesFreeData updated 2026-09-06
  5. Basic Calculator: Classic Calc app icon

    Basic Calculator: Classic Calc

    MobArts Ltd

    Calculate, split, and customize

    Perform general calculations including addition, subtraction, multiplication, division, and square roots. Use memory functions for storage and retrieval. Apply thousands separators and handle numbers up to 60 digits.

    ★ 4.83,214 ratingsUtilitiesFreeData updated 2026-09-08
  6. Financial Calculator: Percent app icon

    Financial Calculator: Percent

    Applorium Ltd

    Calculate interest, taxes, and averages

    Calculate metrics with 25+ built-in tools including average share price, tax, interest, profit, markup, discount, mortgage, tip, ROI, IRR, and CAGR. Perform investment analysis and everyday percentage calculations.

    ★ 4.714,729 ratingsFinanceFreeData updated 2026-09-09
  7. Calculator! app icon

    Calculator!

    7th Gear

    Calculate, customize, and solve equations

    Calculator lets users perform basic and scientific calculations with over 30 functions. Switch between portrait and landscape modes. Customize leather color and background texture on iPad. Take notes or draw directly on the interface.

    ★ 4.84,275 ratingsUtilities$0.99Data updated 2026-10-13
  8. Taculator 84 Graphing Calc app icon

    Taculator 84 Graphing Calc

    Di Venisco UG (haftungsbeschrankt)

    Graph functions and solve equations

    Solve math problems with capabilities. Input equations, view function graphs, and analyze statistical data. Perform calculations in algebra, calculus, and statistics. Navigate using arrow keys or touch gestures.

    ★ 4.57,571 ratingsEducationFreeData updated 2026-09-17
  9. Color Calculator-smart&cute app icon

    Color Calculator-smart&cute

    Wuhan Ananta Technology Co., Ltd.

    Calculate with and customize your interface

    Offers scientific and standard modes for math tasks. Users can customize colors and themes. It provides real-time calculation results and supports basic and advanced operations.

    ★ 4.715,762 ratingsUtilitiesFreeData updated 2026-09-21
  10. Measure Master Pro Calculator app icon

    Measure Master Pro Calculator

    Calculated Industries, Inc.

    Solve U.S. and metric unit conversions.

    The app converts U.S. and metric units for measurements, including linear, area, and volume dimensions.

    ★ 4.94,284 ratingsUtilitiesFreeData updated 2026-09-16
  11. GraphNCalc83 app icon

    GraphNCalc83

    Ernest Brock

    Calculate, graph, and edit math problems

    Solve math problems with natural textbook input and fraction support. Trace graphs with touch. Zoom using pinch gestures. Tap for regression analysis. Swipe to scroll through calculation history and matrices. Access help via the ? key.

    ★ 4.94,041 ratingsEducation$12.99Data updated 2026-11-03
  12. Programming Hub: Learn Coding app icon

    Programming Hub: Learn Coding

    Rightsol PTE LTD

    To code with interactive lessons

    Languages like HTML, JavaScript, Python, and Java through interactive lessons and game-like challenges. Complete code examples, access 35+ courses, and use a fast compiler to test and run code instantly.

    ★ 4.89,845 ratingsEducationFreeData updated 2026-09-10
  13. Simple Calculator. app icon

    Simple Calculator.

    tasser gyati

    Calculate with real-world logic

    Perform calculations with a running total and real-world logic. Handle cost, sell, and margin computations. Add or subtract percentages in one step. Features large buttons and a clear display for easy use.

    ★ 4.61,606 ratingsUtilitiesFreeData updated 2026-09-14
  14. OneCalc: All-in-one Calculator app icon

    OneCalc: All-in-one Calculator

    tasser gyati

    Calculate, convert, and solve equations

    Offers standard and advanced math functions including percent, negative sign, memory, brackets, and history. It includes trigonometry, roots, exponents, and logarithms.

    ★ 4.65,075 ratingsProductivityFreeData updated 2026-09-14
  15. 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

How we rank alternatives

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