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 281–300 of 1,000 ranked alternatives.

  1. DB50X app icon

    DB50X

    Christophe de Dinechin

    ★ 5.09 ratingsProductivity$9.99Data updated 2026-11-06
  2. Plusly Calculator app icon

    Plusly Calculator

    Emmanuel Vizcarra

    Calculate, edit, and share results

    Perform calculations with advanced operators and scientific functions. Use trigonometric, logarithmic, and round functions. Calculate tips and discounts. Edit expressions on the fly with a magic cursor. Share results directly.

    ★ 5.01 ratingsUtilitiesFreeData updated 2026-09-06
  3. AZ Calculator: AI & More app icon

    AZ Calculator: AI & More

    Gerardo Arellano

    Calculate, convert, and solve instantly

    Perform calculations with a scientific calculator, convert units, and use health tools like BMI and body fat calculators. Access financial calculators for loan and investment estimates.

    ★ 4.434 ratingsUtilitiesFreeData updated 2026-09-06
  1. RLM-15CX app icon

    RLM-15CX

    Ricardo Lira Matte

    Calculate, program, and solve equations

    The functions as a programmable scientific calculator with HP-15C features. Users can perform financial calculations including account balance tracking with interest rates and loan amortization schedules.

    ★ 4.114 ratingsProductivityFreeData updated 2026-09-06
  2. RPN-67 Pro app icon

    RPN-67 Pro

    Willy Kunz

    Programmable calculator for iOS

    Run programs and perform calculations using a simulated HP-67 calculator. Input numbers and commands via on-screen keys. Access built-in functions and mathematical operations. Load and execute stored programs from magnetic card files.

    ★ 4.36 ratingsProductivity$4.99Data updated 2026-09-08
  3. Calculator Plus History Record app icon

    Calculator Plus History Record

    Chirag Gabani

    Calculate and view past entries

    Track and view past calculations in real time during use. Perform basic math operations with customizable settings. Save calculation for future reference and verification.

    ★ 4.414 ratingsUtilitiesFreeData updated 2026-09-06
  4. Physics Toolkit app icon

    Physics Toolkit

    Electronial

    Calculate formulas and values

    Perform calculations using built-in formulas and calculators for displacement, acceleration, Newton's second law, gravitational acceleration, Hooke's law, momentum, work, density, kinetic energy, potential energy, elastic energy, electric power,

    ★ 4.651 ratingsEducationFreeData updated 2026-09-14
  5. ScientificLite app icon

    ScientificLite

    Hannes Sverrisson

    Scientific functions easily accessible on screen.

    The app offers scientific functions accessible by swiping between exponents, logs, and sinus functions. Users can correct entries with a backspace key, copy and paste numbers, and customize backgrounds and digits.

    ★ 4.719 ratingsBusinessFreeData updated 2026-09-22
  6. RV Pocket Reference app icon

    RV Pocket Reference

    Calculated Industries, Inc.

    Explore RV systems with diagrams

    Access RV types, classes, and system diagrams for electrical, plumbing, and appliance setups. Includes calculators for weight, leveling, and towing calculations.

    ★ 4.661 ratingsReference$1.99Data updated 2026-10-18
  7. Slide Rule app icon

    Slide Rule

    正行 Akamatsu

    A mechanical analog computer simulator.

    The app simulates a mechanical analog computer used for scientific calculations. It performs multiplication, division, square, cube, square root, and cubic root functions.

    ★ 1.01 ratingsProductivity$0.99Data updated 2026-09-10
  8. RealCalculator: AI Solver app icon

    RealCalculator: AI Solver

    HigherGroundsTech LLC

    Solve problems with step-by-step guidance

    Solve math, biology, physics, chemistry, nursing, economics, and history problems with AI-powered step-by-step guidance. Type or snap a photo of equations or questions for instant answers.

    ★ 4.450 ratingsUtilitiesFreeData updated 2026-09-06
  9. Calculator Pro : All in 1 calc app icon

    Calculator Pro : All in 1 calc

    Ankur Dhameliya

    Calculate, solve, and analyze equations

    Offers basic and scientific calculation tools. Perform addition, subtraction, multiplication, and division with the basic . Use trigonometric functions, logarithms, and exponents in the scientific mode. Save and recall previous calculations.

    ★ 4.724 ratingsUtilitiesFreeData updated 2026-09-06
  10. Math Central app icon

    Math Central

    Akash Pulinthanathu

    Practice problems and track progress

    Practice arithmetic operations, exponents, and equations with randomly generated problems. Solve mixed operations, work with scientific notation, and calculate roots. Track progress and review solutions for each problem.

    ★ 4.746 ratingsEducationFreeData updated 2026-09-11
  11. Linear Regression Equation app icon

    Linear Regression Equation

    Aberdeen Telecom Inc.

    Calculate equations

    Enter and validate data in a table with error detection. Calculate equations with and without predicted values. Predict y values within the range of x data.

    ★ 0.00 ratingsEducationFreeData updated 2026-09-06
  12. SIMpull 600V Calculator app icon

    SIMpull 600V Calculator

    Southwire Company

    Calculate wire pull characteristics and generate NEC®

    The includes multiple calculators for electrical wire pull calculations. Users can input parameters for voltage drop, ground wire sizing, ampacity adjustments, and phase wire attributes. Results are generated according to NEC® standards.

    ★ 4.259 ratingsReferenceFreeData updated 2026-09-08
  13. Calx: Stack calculator app icon

    Calx: Stack calculator

    Daniel Clelland

    RPN calculator with stack manipulation.

    The app is an RPN calculator that uses a stack for number manipulation. It includes a tutorial, gestural interaction, multiple keypads with various functions, and customization options for fonts and colors.

    ★ 5.02 ratingsUtilities$0.99Data updated 2026-11-13
  14. Pocket Slide Rule Expert app icon

    Pocket Slide Rule Expert

    Andrew Hall

    Learn slide rule calculations with precision.

    The app offers a classic slide rule experience with precision and educational features. Users can learn calculations through an auto-slide-rule mode and select from 19 basic operations, including multiplication, division, powers, and logarithms.

    ★ 4.84 ratingsEducation$0.99Data updated 2026-11-09

How we rank alternatives

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