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 221–240 of 1,000 ranked alternatives.

  1. CITIZEN & GST CALCULATOR app icon

    CITIZEN & GST CALCULATOR

    Rajeshbhai Dholakiya

    Calculate taxes with one click

    Calculate taxes with real-time GST rate updates. Input values to compute and GST amounts. Use memory functions M+, M-, MR, MU for financial calculations. Switch between two button layouts for easier navigation.

    ★ 4.818 ratingsUtilitiesFreeData updated 2026-09-06
  2. Scientific++ app icon

    Scientific++

    Behzad Dogahe

    Scientific calculations with added functionality.

    The app shows expressions as users enter them and keeps a history of calculations. It performs fraction and angle conversions, solves equations, and converts between coordinate systems.

    ★ 4.561 ratingsUtilities$2.99Data updated 2026-09-23
  3. GeoGebra Scientific Calculator app icon

    GeoGebra Scientific Calculator

    GeoGebra GmbH

    Calculate and solve math problems

    Perform calculations with fractions, trigonometric functions, statistics, and exponential/logarithmic operations. Use exam mode for test environments. Replace traditional calculators with this tool for math and science learning.

    ★ 4.625 ratingsEducationFreeData updated 2026-09-15
  1. RPN Calculator free app icon

    RPN Calculator free

    Benjamin Pisano

    Scientific calculator with RPN mode.

    The app offers scientific calculator functions and RPN mode for fast calculations. Its uncluttered interface uses the RPN system favored by engineers and scientists.

    ★ 1.01 ratingsUtilitiesFreeData updated 2026-10-04
  2. Numerari Scientific Calculator app icon

    Numerari Scientific Calculator

    KnowledgeDoor LLC

    Solve complex science and math problems.

    The app offers comprehensive unit calculations and complex number support. It includes powerful graphing capabilities and a wide range of functions for scientific and mathematical problem-solving.

    ★ 5.032 ratingsUtilities$6.99Data updated 2026-10-05
  3. Graphulator With Calculus app icon

    Graphulator With Calculus

    Paul Turmel

    Plot equations, calculate values, analyze data

    Allows users to plot 2D and 3D equations variable scaling. Input and solve scientific calculations, trigonometric functions, and logarithms. View data outputs and perform numerical operations.

    ★ 0.00 ratingsUtilitiesFreeData updated 2026-09-10
  4. Good Grapher - scientific graphing calculator app icon

    Good Grapher - scientific graphing calculator

    Iurii Mozharovskyi

    Graph functions and solve equations

    With history tape, real and complex number support, angle modes including radians and degrees. Features constants, unit conversions, and capabilities for equations and functions.

    ★ 4.6122 ratingsEducationFreeData updated 2026-09-08
  5. MGPC Marriage Point Calculator app icon

    MGPC Marriage Point Calculator

    Rajan Maharjan

    Calculate scores for games

    Calculate scores for , Call Break, and Kitti (Rummy) games. Track points and adjust rates during gameplay. Customize game settings and record scores for each round.

    ★ 4.7115 ratingsGamesFreeData updated 2026-09-06
  6. Archimedes Calculator app icon

    Archimedes Calculator

    Patrick Pijnappel

    Pick formulas, calculate results

    Solve equations and plot graphs with precision. Access a formula library to input and calculate formulas with automatic unit support. Find intersections, integrals, and derivatives through intuitive plotting features.

    ★ 4.470 ratingsEducationFreeData updated 2026-09-08
  7. Scientific Calculator++ app icon

    Scientific Calculator++

    Behzad Dogahe

    Calculate, graph, and analyze data

    Calculator++ displays expressions in real-time and maintains a calculation history. It supports fraction operations, unit conversions, and advanced functions. Users can graph equations and perform complex calculations.

    ★ 5.021 ratingsUtilities$2.99Data updated 2026-09-08
  8. Calculator #1 for iPad app icon

    Calculator #1 for iPad

    PAI STUDIO, OOO

    Calculate, edit, and solve equations

    Perform complex calculations with scientific functions and engineering tools. Input equations, use memory functions, and switch between degrees and radians. Save results and view calculation history.

    ★ 4.357 ratingsUtilitiesFreeData updated 2026-09-25
  9. SlipStick app icon

    SlipStick

    Steve Glenner

    Calculate with a slide rule

    Perform multiplication, division, logarithmic, and trigonometric calculations using a slide rule interface. Adjust scales for precise measurements. Manual operation requires sliding components to compute results.

    ★ 4.69 ratingsEducation$0.99Data updated 2026-10-25
  10. Calculator!! app icon

    Calculator!!

    Behzad Dogahe

    Calculate and track expressions

    Calculator displays calculations in real-time and saves a history accessible by swiping up. It handles fractions, converting between proper, improper, and mixed formats. It supports degrees, minutes, and seconds for angle input.

    ★ 4.456 ratingsUtilities$2.99Data updated 2026-09-08
  11. RPN-67 NP app icon

    RPN-67 NP

    Willy Kunz

    Simulate HP-67 calculator functions

    Load and run 25 original programs from the HP-67 calculator. Perform calculations using reverse Polish notation. Access a wide range of mathematical and scientific functions. Store and retrieve programs using magnetic card simulation.

    ★ 4.04 ratingsProductivityFreeData updated 2026-09-08
  12. Scientific Calculator Pro++ app icon

    Scientific Calculator Pro++

    DigiGalaxy LLC

    Calculate, convert, and explore science

    Perform complex calculations including algebraic, trigonometric, and logarithmic functions. Convert units across multiple categories. Access physical constants and formulas. Use fractions, degrees/minutes/seconds, and a high-precision display.

    ★ 0.00 ratingsEducation$2.99Data updated 2026-09-18
  13. DataAnalysis app icon

    DataAnalysis

    Evan Kantrowitz

    Plot data, fit curves, predict values

    Allows users to plot and fit x, y data pairs. It supports curve fitting, value prediction, and kinetic data analysis. Data can be entered manually or imported from text or CSV files. Users can perform statistical analysis and generate graphs.

    ★ 4.1106 ratingsProductivityFreeData updated 2026-09-08

How we rank alternatives

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