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 141–160 of 1,000 ranked alternatives.

  1. CalcMadeEasy app icon

    CalcMadeEasy

    Lalit Patil

    Calculate and note with precision

    Perform calculations using a scientific calculator with customizable layouts. Take notes automatically with the notepad feature. Enable multitasking with slide over and split view on iPad. Drag and drop elements for easy rearrangement.

    ★ 4.7335 ratingsUtilitiesFreeData updated 2026-09-08
  2. Electrical Calculator lite app icon

    Electrical Calculator lite

    V PUGAZHENTHI

    Calculate voltage, current, and resistance

    Calculate values using resistor color codes, voltage, current, and resistance formulas. Perform impedance and RLC circuit analysis. Input values to get accurate results for engineering, wiring, and circuit design tasks.

    ★ 4.6575 ratingsUtilitiesFreeData updated 2026-09-09
  3. Trigonometry Help app icon

    Trigonometry Help

    Armchair Engineering

    Solve right-angled triangles quickly

    Solve right-angled triangles by inputting known sides or angles. View step-by-step calculations and a scale drawing of the triangle. Access basic trigonometric formulae. Enter angles in radians, decimal degrees, or degrees, minutes, seconds.

    ★ 4.7481 ratingsUtilities$1.99Data updated 2026-11-04
  1. Bamboo Calculator app icon

    Bamboo Calculator

    煦 张

    Track calculations and review steps

    Track calculations with a step-by-step history. Perform basic arithmetic operations. Save and review previous steps. Calculate totals for budgets or shopping lists. Edit or clear individual steps. Export results as text.

    ★ 4.6116 ratingsUtilities$4.99Data updated 2026-09-08
  2. Matrix Solver Step by Step app icon

    Matrix Solver Step by Step

    Yuri Morozov

    Solve matrices and show steps

    Solves matrices with calculations like inversion, determinant, and decomposition. Explains each of algorithms. Offers interactive geometric visuals. Includes tutorials with proofs and links to related topics for Linear Algebra concepts.

    ★ 4.863 ratingsEducationFreeData updated 2026-09-06
  3. PocketCAS lite for Mathematics app icon

    PocketCAS lite for Mathematics

    Timing Software GmbH

    Solve math problems and graph functions

    Solve math problems from elementary to calculus and statistics. Graph functions, perform algebraic manipulations, and calculate statistical values. Export results and share solutions.

    ★ 4.7204 ratingsEducationFreeData updated 2026-09-08
  4. CompSci Calculator app icon

    CompSci Calculator

    Corey Smith

    Calculate in decimal, hexadecimal, and binary

    Calculate in decimal, hexadecimal, and binary bases. Switch between bases during equations and view real-time conversions. Display values in all three bases simultaneously. Perform arithmetic operations across different number systems.

    ★ 4.442 ratingsUtilitiesFreeData updated 2026-09-11
  5. Citizen Calculator App app icon

    Citizen Calculator App

    Devkrushna Infotech Private Limited

    Calculate, add, subtract, multiply, divide, and percentage

    Perform basic arithmetic operations including addition, subtraction, multiplication, and division. Calculate percentages and use memory functions like M+, M-, MR, MU, and GT. Includes square root functionality.

    ★ 4.7351 ratingsUtilitiesFreeData updated 2026-10-19
  6. jCalc – Scientific Calculator app icon

    jCalc – Scientific Calculator

    Jon Ericksen

    Calculate fractions and decimals instantly

    Solve mathematical problems with fraction, decimal, and equation input. Display results in decimal, rational, , or trigonometric formats. Support up to 16 decimal places for precise calculations.

    ★ 4.6258 ratingsUtilitiesFreeData updated 2026-09-09
  7. Calculator & AI Math Solver app icon

    Calculator & AI Math Solver

    AppManage LLC

    Calculate, edit, and track equations

    Perform basic and complex calculations with a minimalist interface. Large buttons and a display show current input and calculation history. Supports portrait and landscape orientation. Includes AI-powered problem-solving for advanced operations.

    ★ 4.843 ratingsUtilitiesFreeData updated 2026-09-06
  8. iCalc Lite - Calculator app icon

    iCalc Lite - Calculator

    Gilbert Montane Pinto

    Calculate, convert, and solve equations

    Perform basic and scientific calculations with arithmetic and trigonometric functions. Switch between portrait and landscape modes. Store frequently used values for quick access.

    ★ 4.612 ratingsUtilitiesFreeData updated 2026-09-10
  9. Art of Stat: Distributions app icon

    Art of Stat: Distributions

    Bernhard Klingenberg

    Explore with interactive visuals

    Explore probability with interactive sliders and buttons. Calculate probabilities and percentiles for upper tail, lower tail, or two-tailed tests. Visualize results alongside numerical solutions. Compare continuous and discrete side-by-side.

    ★ 4.853 ratingsEducationFreeData updated 2026-09-06
  10. RPN-45 SD app icon

    RPN-45 SD

    Willy Kunz

    Calculate with scientific precision and enhanced functions

    Simulate the HP-45 scientific calculator with photo-realistic visuals and original LED or LCD display. Print calculations, animate keys with sound and feedback, and replicate the calculator's computation times.

    ★ 4.315 ratingsProductivity$1.99Data updated 2026-09-08
  11. John Cominio RPN Calculator app icon

    John Cominio RPN Calculator

    John Cominio

    Calculate using RPN notation and scientific functions

    Scientific with reverse polish notation. Perform square root, reciprocal, trigonometric functions, hyperbolic functions, and logarithms. Switch between degrees, radians, and gradians. Calculate factorials, exponents, and nth roots.

    ★ 4.99 ratingsProductivityFreeData updated 2026-09-08
  12. AI Math Solver+ app icon

    AI Math Solver+

    Best mobile app, MB

    Capture problems and get step-by-step solutions

    Capture problems with the camera for instant step-by-step solutions. Solve algebraic expressions, equations, functions, and sequences. View detailed explanations and practice similar problems.

    ★ 4.6347 ratingsEducationFreeData updated 2026-09-06
  13. ArcCalc app icon

    ArcCalc

    Roseller Sunga

    Calculate arc dimensions with two values

    Calculate arc dimensions including radius, length, width, height, apothem, angle, and area. Input any two values to derive the rest. Useful for carpenters, architects, and engineers. Supports complex mathematical calculations.

    ★ 4.8268 ratingsProductivityFreeData updated 2026-09-08
  14. Calculator´ app icon

    Calculator´

    Oval Software Oy

    Calculate, edit, and share formulas

    Perform calculations with a customizable interface and live results. Define and share advanced functions. Use 3D Touch shortcuts and an expandable widget. Search history via Spotlight.

    ★ 4.6472 ratingsProductivityFreeData updated 2026-09-09
  15. Calculator # Converter app icon

    Calculator # Converter

    CAT VIET SOFTWARE DEVELOPMENT & MEDIA JSC

    Calculations made simpler than ever before.

    The app offers a scientific calculator with over 800 formulas. It includes currency and unit converters, date and time functions, and finance tools.

    ★ 4.370 ratingsUtilitiesFreeData updated 2026-09-25
  16. NumWorks Graphing Calculator app icon

    NumWorks Graphing Calculator

    NumWorks

    Calculate, graph, and explore math problems

    Solve math problems with , algebra, and calculus functions. Input equations, plot graphs, and analyze results. Store and recall previous calculations. Sync with calculators for seamless data transfer.

    ★ 4.498 ratingsEducationFreeData updated 2026-09-17
  17. Pipe Calc Elite app icon

    Pipe Calc Elite

    Cyberprodigy LLC

    Calculate dimensions and pressure loss

    Calculate dimensions and pressure loss for 7 materials. Solve linear and rolling offsets, cutbacks, and other job site equations. Convert units and store standard data for quick access.

    ★ 4.8152 ratingsUtilities$19.99Data updated 2026-09-08

How we rank alternatives

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