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 201–220 of 1,000 ranked alternatives.

  1. Graphing Calculator app icon

    Graphing Calculator

    Sarah Ragab

    Six calculators in one app.

    The app offers six calculator types including graphing, handwriting, and scientific functions. It displays equations and results simultaneously, supporting equation solving and graph plotting.

    ★ 3.917 ratingsEducation$4.99Data updated 2026-09-14
  2. BA Financial Calculator Plus app icon

    BA Financial Calculator Plus

    RAY INFORMATICS YAZILIM TEKNOLOJI MEDYA DANISMANLIK VE EGITIM TICARET LIMITED SIRKETI

    Calculate loans, budgets, and investments

    Calculate metrics with time value of money tools including future value, present value, interest rate, and period. Use scientific notation in calculations. View data visualizations and generate reports. Access formulae and examples for each .

    ★ 4.5145 ratingsFinanceFreeData updated 2026-09-11
  3. HP-35 app icon

    HP-35

    Enrique Haro

    ★ 5.05 ratingsUtilitiesFreeData updated 2026-09-06
  1. SciCalc82 app icon

    SciCalc82

    Paul SALANITRI

    Calculate with retro-style precision

    A vintage-style scientific calculator with a retro LCD display and realistic key sounds. Perform basic and advanced calculations, use shift functions, and access additional modern features like parentheses and memory storage.

    ★ 4.619 ratingsUtilitiesFreeData updated 2026-09-08
  2. ALL Maths Formulas Guide app icon

    ALL Maths Formulas Guide

    rana hamad khan

    Access , solve equations, calculate results

    Access for integrals, polynomials, analytic geometry, calculus, algebra, probability, statistics, trigonometry, matrices, equations, integration, derivatives, limits, geometry, and logic. View complete lists of over 2000 .

    ★ 4.456 ratingsProductivityFreeData updated 2026-09-15
  3. Watts Amps Volts  Calculator app icon

    Watts Amps Volts Calculator

    Pro Certs Software Ltd

    Calculate , , and

    Calculate electrical power for single phase systems by converting between , , and . Input values to solve for unknowns. Support for three phase calculations including kilowatts, , , and power factor.

    ★ 4.450 ratingsUtilitiesFreeData updated 2026-09-08
  4. Big Number Calculator Pro app icon

    Big Number Calculator Pro

    Tuyen Nguyen

    Calculate large numbers with precision

    Handles large integers and decimal numbers. Perform high-precision addition, subtraction, multiplication, and division. Save and recall previous calculations. Convert between formats.

    ★ 0.00 ratingsUtilities$0.99Data updated 2026-09-06
  5. RPN Calculus app icon

    RPN Calculus

    Thomas Braun

    Scientific RPN calculator for iPad.

    The app performs calculations with up to 15 digits of precision and supports a number range from -1E127 to 1E127. It includes a database of over 120 scientific constants that users can extend.

    ★ 4.01 ratingsUtilities$1.99Data updated 2026-09-14
  6. MR. CALC app icon

    MR. CALC

    Yuma Kitasei

    Calculate with formulas and swipe between calculators

    A calculator displays formulas during calculations. Users can switch between seven calculators by swiping. Perform basic and advanced math operations. Store and reuse calculation history. Adjust display settings for different modes.

    ★ 4.841 ratingsUtilitiesFreeData updated 2026-09-22
  7. NerdCalc app icon

    NerdCalc

    Nidal Fakhouri

    Calculate in binary, hex, and decimal simultaneously

    Convert numbers between binary, hexadecimal, and decimal bases. Display all three bases simultaneously. Switch input modes and see results in all bases. Perform arithmetic, logic, and bitwise operations. Support unsigned and 2’s complement numbers.

    ★ 4.8183 ratingsUtilitiesFreeData updated 2026-09-08
  8. Calculator SC-323PU app icon

    Calculator SC-323PU

    Thomas Oellinger

    Calculate, edit, and track equations

    The provides scientific calculations, unit conversion, and logic-based computations. Users can switch between modes. It includes a built-in manual for operation guidance. Perform n-base conversions and unit-based calculations.

    ★ 4.7118 ratingsUtilities$3.99Data updated 2026-09-08
  9. CalcKit app icon

    CalcKit

    Akkyra Systems

    Create personalized calculators with custom formulas.

    The app allows users to design calculators with custom formulas and input labels. Users can create an unlimited number of personalized calculators for various needs.

    ★ 0.00 ratingsUtilitiesFreeData updated 2026-09-11
  10. Kalculator app icon

    Kalculator

    Koombea, Inc.

    Calculate complex formulas instantly

    Perform complex calculations with parentheses, exponents, and multiple operations. Solve equations, convert units, and use scientific functions. Save and recall previous calculations. Share results via copy-paste or email.

    ★ 4.219 ratingsUtilitiesFreeData updated 2026-09-08
  11. Electronics Kit app icon

    Electronics Kit

    Siu Yuen Ho

    Calculate, measure, and test components

    Calculate component values for desired corner frequency, resistance, capacitance, or inductance. Find combinations of resistors, capacitors, and inductors. View detailed calculations and formulas. Export results. Remove ads with PRO version.

    ★ 4.865 ratingsUtilitiesFreeData updated 2026-09-12
  12. MathStudio app icon

    MathStudio

    Pomegranate Apps LLC

    Compute, plot, animate math equations

    Create and test mathematical algorithms with a powerful computational engine. Build interactive plots and animations. Execute code and view results in real-time. Share calculations and export data in multiple formats.

    ★ 4.6170 ratingsEducation$19.99Data updated 2026-09-09
  13. Calculator for School app icon

    Calculator for School

    KRASHSOFT LLC

    Calculate, convert, solve, and graph

    Calculate with four modes: basic for arithmetic and percentages, scientific for algebra and trigonometry, programming for command line expressions in multiple numerical systems, and minimalist for simplicity.

    ★ 4.511 ratingsUtilitiesFreeData updated 2026-09-06
  14. ACalc - Scientific Calculator app icon

    ACalc - Scientific Calculator

    Netviking AB

    Calculate with trigonometric and exponential functions

    Store values by pressing "STO" and selecting a memory slot. Perform basic arithmetic and advanced mathematical functions including sine, cosine, logarithm, and exponential.

    ★ 4.382 ratingsUtilitiesFreeData updated 2026-09-09

How we rank alternatives

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