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 81–100 of 1,000 ranked alternatives.

  1. Plus42 app icon

    Plus42

    Thomas Okken

    Calculate, program, and solve equations

    Perform complex calculations using algebraic expressions and programmable functions. Support unit conversions and attached units. Save and recall variables. Run scripts and access a comprehensive mathematical library. Export results and history.

    ★ 4.979 ratingsUtilities$9.99Data updated 2026-11-09
  2. MathU RPN Calc app icon

    MathU RPN Calc

    Creative Creek, LLC

    Calculate with RPN and 96 functions

    Perform complex calculations using Reverse Polish Notation. Access over 96 functions including financial, scientific, and engineering operations. Store and recall values. Switch between decimal and hexadecimal modes.

    ★ 5.0135 ratingsFinance$24.99Data updated 2026-09-08
  3. Tydlig app icon

    Tydlig

    Tydlig Software AB

    Calculate with clarity and precision

    Perform calculations with a freeform canvas and responsive results. Link numbers for instant updates. Calculate tips and discounts. View full history with clear formatting. Adjust settings for precision and layout.

    ★ 4.82,625 ratingsUtilities$1.99Data updated 2026-09-08
  1. EduCalc Classic Pro app icon

    EduCalc Classic Pro

    William Jockusch

    Scientific calculator with graphing and more.

    The app offers a scientific calculator with complex number support and programmable keys. It includes graphing capabilities for up to nine equations, vector and matrix calculations, and a unit converter for various measurements.

    ★ 4.422 ratingsEducation$1.99Data updated 2026-09-14
  2. PCalc Lite app icon

    PCalc Lite

    TLA Systems Ltd.

    Calculate with advanced scientific functions

    Perform complex calculations with support for hexadecimal, octal, and binary. Use RPN mode and multi-line display. Access unit conversions, constants, and scientific notation. View a paper tape and use multiple undo/redo functions.

    ★ 4.4214 ratingsUtilitiesFreeData updated 2026-09-08
  3. OmniCalc app icon

    OmniCalc

    John Carter

    Calculator with date math functions.

    The app offers standard, scientific, statistical, and date math calculator functions. Users can scroll through operations, make changes with instant results, and save formulas or history.

    ★ 4.689 ratingsUtilitiesFreeData updated 2026-09-13
  4. Construction Calculator Master app icon

    Construction Calculator Master

    Uncaught Exception Inc.

    Calculate and visualize projects

    Perform calculations with math functions and trigonometry. Switch between units like feet, inches, yards, and metric. Visualize measurements and fractions. Track projects with customizable templates. Export results in various formats.

    ★ 4.3433 ratingsUtilitiesFreeData updated 2026-09-06
  5. Schoolovo app icon

    Schoolovo

    Jakub Klementewicz

    Solve math problems step by step

    Solve math problems step-by-step with detailed explanations. Input equations to see solutions. Learn algebra, functions, fractions, and graphs. Verify answers and track progress. Supports multiple math topics including linear and quadratic functions.

    ★ 4.8727 ratingsEducationFreeData updated 2026-09-06
  6. CALC Smart Calculator ± app icon

    CALC Smart Calculator ±

    QApps LLC

    Calculate, convert, and solve equations

    Perform complex calculations with scientific formulas and unit conversions. Access calculation history via Spotlight and 3D Touch. Use widgets for quick access and history integration. Sync with Apple Watch for notifications and basic calculations.

    ★ 4.82,367 ratingsUtilitiesFreeData updated 2026-09-08
  7. SymCalc+ app icon

    SymCalc+

    Voxeloid Kft.

    Solve math problems instantly

    Solve math problems from basic arithmetic to advanced algebra. Perform exact fraction calculations and store unlimited variables. Create custom functions and graph equations. Use a powerful algebra engine for precise results.

    ★ 4.791 ratingsEducation$9.99Data updated 2026-09-13
  8. Calculator-Basic & Scientific app icon

    Calculator-Basic & Scientific

    清龙 李

    Calculate, solve, and analyze math problems

    Perform basic and calculations including trigonometric and inverse trigonometric functions. Use mathematical functions like absolute value, ceiling, floor, and rounding. Modify calculations in real time by clicking steps.

    ★ 4.7338 ratingsUtilitiesFreeData updated 2026-09-06
  9. Calc Pro - Simple and Useful app icon

    Calc Pro - Simple and Useful

    Keita Nonaka

    Calculate large numbers precisely

    Perform complex mathematical calculations with up to 15 digits of decimal precision. Handle large numbers without ellipsis. Save and reuse calculation equations. Access calculation history even after closing the .

    ★ 4.86 ratingsUtilitiesFreeData updated 2026-09-16
  10. Endless Numbers app icon

    Endless Numbers

    Originator Inc.

    Learn letters, words, and stories together

    Learn number recognition, sequences, and basic addition through interactive activities. Explore quantity concepts and numerical patterns. Complete challenges to reinforce math skills. Sync progress across devices.

    ★ 4.41,494 ratingsEducationFreeData updated 2026-09-08
  11. Calculator HD: Big Buttons app icon

    Calculator HD: Big Buttons

    Studio Zebra

    Calculate with large, easy-to-read numbers

    A for with a large, easy-to-read display. Perform basic arithmetic operations. Use user-friendly controls for quick calculations.

    ★ 4.51,938 ratingsUtilitiesFreeData updated 2026-09-10
  12. Master Electrician Ref. Lite app icon

    Master Electrician Ref. Lite

    PawEng, LLC

    Electrician's pocket reference guide calculations.

    The app provides an electronic pocket reference guide for electrical professionals. It includes sections on motors, wiring, ampacities, grounding, voltage drop, conduit bending, tools, and safety.

    ★ 4.72,513 ratingsProductivityFreeData updated 2026-11-05
  13. Ohms Law Calc. app icon

    Ohms Law Calc.

    V PUGAZHENTHI

    Calculate voltage, current, and resistance

    Calculate electrical values using formulas for voltage, current, resistance, power, and more. Determine wire size and voltage drop. Perform transformer and generator calculations. Convert between electrical units.

    ★ 4.71,326 ratingsUtilitiesFreeData updated 2026-09-08
  14. Calctan app icon

    Calctan

    Jorge Lozada

    Calculate complex equations

    Perform complex calculations with scientific functions, trigonometry, and unit conversions. Customize themes, adjust display settings, and save frequently used formulas. Export results and share calculations directly.

    ★ 4.561 ratingsUtilitiesFreeData updated 2026-09-16
  15. Conduit Bender Elite - Calc app icon

    Conduit Bender Elite - Calc

    Cyberprodigy LLC

    Calculate bends, mark measurements, track progress

    Calculate bends with step-by-step guidance for offset and rolling offset types. Input measurements to determine bend angles and lengths. Include diagrams for visual reference. Export bend data for use in installations.

    ★ 4.81,721 ratingsUtilities$8.99Data updated 2026-11-08
  16. Calculate84 Plus app icon

    Calculate84 Plus

    Di Venisco UG (haftungsbeschrankt)

    Graph equations and calculate advanced math functions

    Graph functions with support for multiple equations and color differentiation. Plot up to ten functions simultaneously. Use touch gestures to zoom and trace graphs. Perform calculations using natural textbook notation and advanced math commands.

    ★ 4.5305 ratingsEducationFreeData updated 2026-09-19
  17. Statistics Calculator++ app icon

    Statistics Calculator++

    Behzad Dogahe

    Calculate stats with Add X, Add Y,

    Calculator++ allows users to input data via "Add X," "Add Y," and "Add Z" buttons. It calculates sum, mean, standard deviation, quartiles, and more. Results are displayed in a table. Box and whisker plots and histograms visualize data.

    ★ 4.1309 ratingsUtilities$2.99Data updated 2026-09-08

How we rank alternatives

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