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 261–280 of 1,000 ranked alternatives.

  1. StudentLite app icon

    StudentLite

    Hannes Sverrisson

    Calculate scientific functions with ease

    Scientific calculator allows users to perform complex calculations with swipe navigation between functions. Access exponents, logs, and sinus functions easily. View all functions on iPad, with additional options in landscape mode.

    ★ 4.86 ratingsUtilitiesFreeData updated 2026-09-08
  2. Calculator Big Buttons app icon

    Calculator Big Buttons

    Adalgisa Raniolo

    Calculate with big and small size

    A lightweight with large and simple interface. Perform basic calculations and copy results to clipboard. Offers five customizable skins for different visual preferences.

    ★ 4.566 ratingsUtilitiesFreeData updated 2026-09-08
  3. Board Feet Easy Calculator app icon

    Board Feet Easy Calculator

    Scott Mcintosh

    Calculate with ease

    Calculate by entering length, width, and thickness. Optionally specify number of pieces, waste percentage, and cost per . Provides total and cost calculations.

    ★ 4.052 ratingsUtilitiesFreeData updated 2026-09-08
  1. Calculator 1+1 app icon

    Calculator 1+1

    Vikas Choudhary

    Calculate, edit, and track equations

    Perform basic arithmetic operations, including addition, subtraction, multiplication, and division. Use parentheses for complex calculations. Switch between light and dark themes for better visibility.

    ★ 4.47 ratingsUtilitiesFreeData updated 2026-09-06
  2. Bright Brain – Count Quickly & Challenge Your Mind app icon

    Bright Brain – Count Quickly & Challenge Your Mind

    Erik Wegener

    Tap to match text and image

    Is a training that tests verbal, visual, and numerical recognition. Users tap tick or cross based on matching animal types and quantities. Responses must be quick, with decreasing time limits to improve focus.

    ★ 4.540 ratingsGamesFreeData updated 2026-09-13
  3. Pipe Fitting app icon

    Pipe Fitting

    Sarah Ragab

    Calculate layouts quickly and accurately

    Calculator helps users compute offsets and rolling offsets for precise layout planning. Input measurements to calculate basic or advanced rolling angles. Generate detailed reports and save calculations for future reference.

    ★ 4.768 ratingsProductivityFreeData updated 2026-09-06
  4. PCalc app icon

    PCalc

    TLA Systems Ltd.

    Calculate, convert, and program with precision

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

    ★ 0.00 ratingsUtilities$4.99Data updated 2026-09-08
  5. Electrical Engineering Pack app icon

    Electrical Engineering Pack

    V PUGAZHENTHI

    Calculate values instantly

    Perform calculations including resistor color code analysis, transformer voltage and current computations, and voltage, current, resistance, and power determinations. Include upgraded voltage drop calculations compliant with NEC/IEEE standards.

    ★ 4.776 ratingsEducation$4.99Data updated 2026-09-08
  6. Construction Calc Pro Ads app icon

    Construction Calc Pro Ads

    Snappy Appz Inc.

    Calculate feet, inches, and fractions

    C- Pro allows calculations in feet, inches, and fractional inches. It includes modules for material estimates, crown moulding, conversions, area, volume, and arc calculations.

    ★ 2.551 ratingsUtilitiesFreeData updated 2026-09-09
  7. Developer Calc Hex Dec Oct Bin app icon

    Developer Calc Hex Dec Oct Bin

    DAI WEIJIE

    Calculate in multiple number systems

    Perform calculations with binary, octal, decimal, and hexadecimal values displayed simultaneously. Enter and view hex codes and RGB values on the same screen. Display up to 19 decimal digits. Toggle conversion reset on or off.

    ★ 4.114 ratingsUtilitiesFreeData updated 2026-09-08
  8. AI Homework Helper: HomeRest app icon

    AI Homework Helper: HomeRest

    Ivan Apet

    Solve math problems instantly

    Solves math problems from arithmetic to calculus with step-by-step explanations and function graphing. Handles algebra and differential equations. Provides instant solutions and calculations.

    ★ 4.779 ratingsEducationFreeData updated 2026-09-06
  9. Calculator 3 in 1 app icon

    Calculator 3 in 1

    CAT VIET SOFTWARE DEVELOPMENT & MEDIA JSC

    Calculations made simpler than ever before.

    The app offers three calculating modes: STANDARD, STRING, and RPN. It supports precision to 31 digits and complex numbers in STRING mode.

    ★ 2.45 ratingsUtilitiesFreeData updated 2026-10-06
  10. Calculator⊕ app icon

    Calculator⊕

    Anastasia Kovaleva

    Calculate, edit, and track equations

    Perform calculations using basic and complex modes. Handle complex numbers with functions like square roots and exponents. Convert units between different systems. Store and recall previous results.

    ★ 4.910 ratingsUtilitiesFreeData updated 2026-09-06
  11. RPN 28x Calc app icon

    RPN 28x Calc

    Eric Roller

    Enter expressions and calculate results

    Is a programmable scientific calculator with a dynamic stack display. Users can input numbers and operations using reverse-polish notation. The display expands automatically as more values are added, and users can swipe to view additional lines.

    ★ 5.034 ratingsProductivity$6.99Data updated 2026-09-08
  12. Spreadsheets - Create & Edit app icon

    Spreadsheets - Create & Edit

    ByteSpeed Limited

    And manage data anytime

    And with tools for cutting, copying, pasting, and formatting cells. Manage data remotely and restore sheets to maintain accuracy and integrity.

    ★ 4.875 ratingsUtilitiesFreeData updated 2026-09-06
  13. Calculator Ultra for iPhone app icon

    Calculator Ultra for iPhone

    Junhyung Yu

    Calculate, track, and save results

    Perform arithmetic, calculate loans, mortgages, GPA, dates, units, and BMI. Track calculation history for easy reference. Use a clean, intuitive interface for efficient computation.

    ★ 4.769 ratingsUtilitiesFreeData updated 2026-09-06
  14. StemFox Scientific Calculator app icon

    StemFox Scientific Calculator

    Joshua Bryson

    Calculate and complete engineering tasks

    Perform complex calculations with a supporting trigonometry and Bessel functions. Access over 80 mathematical functions and quick references for basic operations. Solve equations efficiently for engineering tasks.

    ★ 4.811 ratingsUtilitiesFreeData updated 2026-09-15
  15. CalcScript app icon

    CalcScript

    Ali Mirala

    Solve equations and manage variables

    Allows users to perform advanced mathematical calculations with variables, complex numbers, and matrices. Enter expressions using natural syntax for ranges, scientific notation, and matrix operations.

    ★ 5.01 ratingsEducationFreeData updated 2026-09-06

How we rank alternatives

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