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 181–200 of 1,000 ranked alternatives.

  1. Unit Conversion - Converter and Calculator app icon

    Unit Conversion - Converter and Calculator

    FAPPS WORLD et Cie SCS

    Convert units and calculate instantly

    Convert units across 16 categories including temperature, currency, distance, weight, and volume. Access a standard and scientific within the . Units are organized by usage frequency with commonly used units displayed first.

    ★ 4.6103 ratingsUtilities$0.99Data updated 2026-09-08
  2. Calculator 42 with History PRO app icon

    Calculator 42 with History PRO

    Nikolay Donets

    Calculate, log, and reuse results

    Allows users to perform basic arithmetic operations including addition, subtraction, multiplication, and division. It supports percentages, parentheses, and expression editing.

    ★ 4.675 ratingsProductivityFreeData updated 2026-09-29
  3. iHP48 app icon

    iHP48

    Alexis Lorca

    Calculate, edit, and store equations

    Perform complex calculations, solve equations, and manage multiple tasks with a scientific calculator. Access a library of functions for engineering, math, and finance. Store and retrieve previous results. Switch between different calculation modes.

    ★ 4.6286 ratingsProductivityFreeData updated 2026-09-06
  1. Calculator - 15 Calculators app icon

    Calculator - 15 Calculators

    RV AppStudios LLC

    Calculate, edit, and store equations

    Perform basic arithmetic operations including addition, subtraction, multiplication, and division. Access scientific functions for advanced calculations. Input data directly for quick results. Store and recall previous calculations.

    ★ 4.418 ratingsUtilitiesFreeData updated 2026-09-06
  2. RPN-45 HD app icon

    RPN-45 HD

    Willy Kunz

    Calculate like a scientific calculator

    Simulate the HP-45 scientific calculator with photo-realistic visuals and animated keys. Perform all original functions and operations. Access a secret timer for 12-hour or 100-hour intervals. Switch to Super-45 mode for enhanced capabilities.

    ★ 4.86 ratingsProductivity$2.99Data updated 2026-09-08
  3. EvalBee app icon

    EvalBee

    Monika Patel

    Grade papers, scan answer sheets, analyze results

    Create answer sheets for MCQ exams with customizable templates. Scan answer sheets in real time using device camera. Generate performance analysis reports. Support templates for JEE, NEET, SAT, CAT, and other MCQ exams.

    ★ 4.7118 ratingsEducationFreeData updated 2026-10-10
  4. Math homework Solver & Helper app icon

    Math homework Solver & Helper

    Elysa Monahan

    Solve equations and graph functions

    Solves problems across arithmetic, algebra, calculus, statistics, and linear algebra. Provides step-by-step explanations and answers. Handles geometry calculations. Offers clear, detailed solutions for complex equations.

    ★ 4.127 ratingsUtilitiesFreeData updated 2026-09-06
  5. Photo Math AI Homework Helper app icon

    Photo Math AI Homework Helper

    Bohdan Oleksa

    Snap problems, get step-by-step solutions

    Solve , algebra, or geometry problems by snapping a or uploading an image. Receive step-by-step solutions instantly. Ask questions in AI chat for tutor-like assistance. Cover word problems, real numbers, expressions, and complex numbers.

    ★ 4.7205 ratingsEducationFreeData updated 2026-09-06
  6. SquareRootCalculator app icon

    SquareRootCalculator

    Jirou Fukuda

    Calculate square roots and fractions

    Calculate square roots and perform fraction operations. Execute basic arithmetic with unlimited precision. Simplify rational expressions easily. Input and compute complex equations without digit overflow.

    ★ 4.237 ratingsProductivityFreeData updated 2026-09-13
  7. NilnocCalc app icon

    NilnocCalc

    John Conlin

    Calculator with multiple display options.

    The app offers a 64-bit calculator with 10 registers for saving values and multiple display options including Hex, Oct, and Bin. It includes trigonometric functions, unit conversions, and combinations/permutations calculations.

    ★ 5.01 ratingsProductivityFreeData updated 2026-10-05
  8. Scientific Calculator - CalCon app icon

    Scientific Calculator - CalCon

    STAGE CODING, Travnik

    Calculate and convert units and currencies

    Perform calculations, convert units and currencies, and compute percentages and proportions. Calculate areas and volumes. Drag and drop to create custom calculators. Solve complex or simple math problems.

    ★ 4.714 ratingsUtilitiesFreeData updated 2026-09-06
  9. Pascal: 3-in-1 Calculator app icon

    Pascal: 3-in-1 Calculator

    Andrew Wei

    Calculate, graph, code with precision

    Perform complex calculations with scientific, graphing, and programmer modes. View graphs and equations. Use the Today widget for quick access. Unlock advanced features with in- purchases. Reinstall to reset trial periods.

    ★ 4.023 ratingsProductivityFreeData updated 2026-09-09
  10. Maths Solver app icon

    Maths Solver

    Canh Pham Khac

    Solve math problems step by step

    Solve high school math problems step-by-step. Find limits, graph functions, and solve polynomial equations. Handle trigonometric equations, systems of equations with up to 5 variables, and inequalities. Calculate derivatives and integrals.

    ★ 4.25 ratingsEducationFreeData updated 2026-09-12
  11. HP Prime Pro app icon

    HP Prime Pro

    MORAVIA Consulting, spol. s r.o.

    Solve math problems and explore graphs

    Solve equations and inequalities with advanced graphing. Trace functions and analyze intersections. Perform calculations, store variables, and use built-in math functions. Access a scientific calculator and explore interactive math concepts.

    ★ 3.281 ratingsEducation$24.99Data updated 2026-09-23
  12. MathStudio Express app icon

    MathStudio Express

    Pomegranate Apps LLC

    Comprehensive math functions for students and engineers.

    The app offers hundreds of mathematical functions covering various subjects like Algebra, Calculus, and Statistics. It provides features comparable to TI calculators with a modern interface for students, teachers, and engineers.

    ★ 4.5110 ratingsEducation$4.99Data updated 2026-09-20
  13. Solve - Graphing Calculator app icon

    Solve - Graphing Calculator

    Pomegranate Apps LLC

    Expressions as you type

    Calculates expressions as you type and stores answers for reuse. It includes four tabs with distinct colors. Users can multiply numbers, calculate tips, and find square roots without resetting. Graph 2D and 3D functions with a single touch.

    ★ 4.7198 ratingsUtilities$1.99Data updated 2026-09-08
  14. Calca app icon

    Calca

    Krueger Systems, Inc.

    Calculate and write with math

    Solve equations and simplify expressions instantly as you type. Create and manipulate variables and functions with few keystrokes. Edit Markdown text to explain calculations and ideas. Share results and export calculations in various formats.

    ★ 4.5157 ratingsProductivity$9.99Data updated 2026-10-20
  15. Patio Calculator Plus app icon

    Patio Calculator Plus

    Calc Hub, LLC

    Calculate materials accurately

    Calculate material needs for patios using seven estimators: concrete slab, pavers, paver base, polymeric sand, sand & gravel, area, and volume. Input dimensions in inches, feet, yards, centimeters, or meters.

    ★ 4.8236 ratingsUtilitiesFreeData updated 2026-09-24
  16. Converter Plus [paid] app icon

    Converter Plus [paid]

    TranCreative Software

    Convert units, calculate, and edit templates

    Convert units and currencies across hundreds of categories with real-time exchange rates updated every 6 hours. Calculate mortgages, loans, tips, and fuel consumption. Edit, create, or download customizable templates for various conversions.

    ★ 4.7201 ratingsUtilities$1.99Data updated 2026-09-08

How we rank alternatives

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