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 101–120 of 1,000 ranked alternatives.

  1. Calculator - MingCalc app icon

    Calculator - MingCalc

    Hangzhou Zhihui Xiaoming Technology Co.,Ltd.

    Record calculations, customize prompts, simplify math

    Perform calculations with a simplified interface and faster performance. Record and search calculation history. Customize prompt sounds and choose from multiple themes. Designed for use on iPad.

    ★ 4.81,788 ratingsUtilitiesFreeData updated 2026-09-06
  2. Panecal Plus Sci. Calculator app icon

    Panecal Plus Sci. Calculator

    Noriyasu Kutsuzawa

    Edit formulas with cursor and swipe.

    The app allows users to enter and modify formulas while checking them, preventing errors. It provides a history of formulas and answers, supporting various number systems and memory functions for calculations.

    ★ 4.8374 ratingsUtilities$2.99Data updated 2026-10-17
  3. RPN-25 CE app icon

    RPN-25 CE

    Willy Kunz

    Calculate with photo-realistic precision

    Simulate the HP-25C calculator with input method. Perform complex calculations, store and recall values, and use programmable functions. Access continuous memory for data retention. View and edit programs directly on the interface.

    ★ 4.69 ratingsUtilities$2.99Data updated 2026-10-01
  1. Abacus Lesson -ADD and SUB- app icon

    Abacus Lesson -ADD and SUB-

    Hirokazu Komatsu

    Learn addition and subtraction with Soroban

    Learn addition and subtraction using a Soroban . Move beads to perform calculations. Practice basic math operations. Track progress with interactive exercises. Sync with devices for continued learning.

    ★ 4.9820 ratingsEducationFreeData updated 2026-09-30
  2. Calculator: The Game app icon

    Calculator: The Game

    Simple Machine, LLC

    Play with numbers and portals

    Solve math problems by adding, subtracting, converting, and reversing numbers. Manipulate values through portals. Use an LCD display for complex equations. Interact with a snarky assistant for guidance. Adjust button sensitivity for precise input.

    ★ 4.71,125 ratingsGamesFreeData updated 2026-09-13
  3. MaxiCalc Free: Big Retro LCD Basic Desk Calculator app icon

    MaxiCalc Free: Big Retro LCD Basic Desk Calculator

    Fernando Sciessere

    A powerful calculator for all needs.

    The app offers two modes: portrait for basic calculations and landscape for scientific functions. Users can track entries with multiple tapes and use memory slots for complex calculations.

    ★ 4.7161 ratingsUtilitiesFreeData updated 2026-10-15
  4. Calculi: Scientific Calculator app icon

    Calculi: Scientific Calculator

    Michael Natole, Jr.

    Calculate, edit, and track equations

    Perform calculations with a multi-line display that supports complex expressions and order of operations. Edit equations, save history, and switch between and basic modes. Share results via copy or email.

    ★ 4.4380 ratingsUtilitiesFreeData updated 2026-09-08
  5. Numerical³ app icon

    Numerical³

    Andrew J Clark

    Type equations, get results

    Numerical² allows users to perform calculations without an equals button. It automatically adds brackets and saves equations to a synced history list. It includes scientific functions and a Today Widget for quick access.

    ★ 4.81,337 ratingsUtilitiesFreeData updated 2026-09-08
  6. Distances To app icon

    Distances To

    Danny Pajevic

    Calculate and fuel costs

    Calculate driving , flight , and fuel costs between locations. View travel time and elevation data. Convert results to miles, kilometers, meters, or feet. Find coordinates in DMS or decimal format. Display road maps for routes.

    ★ 4.3886 ratingsUtilitiesFreeData updated 2026-09-09
  7. Calculator: Pro app icon

    Calculator: Pro

    Appgeneration, Software Technologies, Lda

    Calculate, convert, and solve equations

    MyCalc offers basic and scientific calculation functions. Users can switch between portrait and landscape modes. It supports currency and unit conversions. Results, equations, and conversions can be copied, shared, or saved.

    ★ 4.7584 ratingsProductivityFreeData updated 2026-10-12
  8. Calculator XL app icon

    Calculator XL

    Gero Mazza

    Calculate, convert, and track expenses

    Perform basic and advanced calculations with large, illuminated buttons. Use the scientific for 30 functions. Convert units, calculate loans, and determine tips. Includes standard, scientific, unit converter, loan, and tip calculators.

    ★ 4.7151 ratingsProductivity$9.99Data updated 2026-09-08
  9. GeoGebra Graphing Calculator app icon

    GeoGebra Graphing Calculator

    GeoGebra GmbH

    Graph functions, find points, share results

    Graph functions and equations, plot polar and parametric curves, and find special points like roots and maxima. Perform regression with -fit lines. Search for learning activities. Save and share results with others.

    ★ 4.3284 ratingsEducationFreeData updated 2026-09-11
  10. 10bII Financial Calculator PRO app icon

    10bII Financial Calculator PRO

    An Truong

    Calculate loans, track cash flow, solve problems

    Calculate loan payments, analyze cash flow, and perform investment analysis. Input variables for scenarios. Solve time value of money problems. mortization schedules. Export results to CSV. Sync with tools.

    ★ 4.6251 ratingsFinance$5.99Data updated 2026-11-02
  11. RPN Calculator 48 app icon

    RPN Calculator 48

    Tom Kerrigan

    Calculate with swipe gestures and large buttons

    Perform calculations using reverse Polish notation. Swipe to undo or redo operations. Access a 100-entry stack and 6 memory buttons. View large, easy-to-read displays. Save state on exit. Supports scientific functions and multiple undo/redo levels.

    ★ 4.8242 ratingsUtilities$3.99Data updated 2026-09-08
  12. 10bii Financial Calculator app icon

    10bii Financial Calculator

    K2 Cashflow, Inc.

    Calculate metrics and analyze investments

    Calculate loan payments, investment returns, and compound interest. Input variables to solve for unknowns. Access advanced features like bonds, depreciation, and probability calculations via in- purchase.

    ★ 4.7663 ratingsFinance$5.99Data updated 2026-11-09
  13. Mathematics with PocketCAS Pro app icon

    Mathematics with PocketCAS Pro

    Timing Software GmbH

    Solve math problems and graph functions

    Solve math problems from elementary to college level. Perform algebra, calculus, and statistical calculations. Graph functions and equations. Export results and share solutions. Replace graphing calculators advanced computation tools.

    ★ 4.7526 ratingsEducation$19.99Data updated 2026-09-08
  14. Math Solver Homework helper app icon

    Math Solver Homework helper

    Nayer AbuAlSoud

    Solve , chemistry, and physics problems

    Solve , chemistry, and physics problems with step-by-step explanations. Save completed questions and in an directory. Share solutions via Print, SharePlay, or export. Collaborate with others in real time.

    ★ 4.6630 ratingsEducationFreeData updated 2026-10-23
  15. Scientific Calculator+ HD app icon

    Scientific Calculator+ HD

    Nixus Development

    A convenient scientific calculator app.

    The app provides standard scientific functions like roots, powers, and logarithms. It also includes features such as graph drawing, multiple memory blocks, constants, notes, and a history log.

    ★ 4.5494 ratingsProductivityFreeData updated 2026-10-24

How we rank alternatives

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