205+ iOS apps curated and reviewed
RationalNumberCalculator is the household name in rationalnumbercalculator, but it's far from the only option. We track 205+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 5.0★ (6) | Yes | No | May 2026 |
| 2 |  | Free | 4.7★ (1.7M) | Yes | Yes | Jul 2026 |
| 3 |  | $1.99 | 4.8★ (1.1K) | No | Yes | Jul 2026 |
| 4 |  | Free | 4.6★ (9.6K) | Yes | Yes | Jul 2026 |
| 5 |  | Free | 4.9★ (404K) | Yes | No | Jul 2026 |
| 6 |  | Free | 4.3★ (327) | No | No | Jul 2026 |
| 7 |  | Free | 4.7★ (60K) | No | No | Jul 2026 |
| 8 |  | Free | 4.5★ (46) | Yes | No | Jul 2026 |
Perform calculations with fractions, decimals, and mixed numbers. Supports addition, subtraction, multiplication, and division. Results can be displayed in various formats.
This app offers a comprehensive suite of calculation tools, including basic, scientific, and unit conversion functions. It features an AI-powered math solver that can solve problems from photos and a dedicated math notes section for jotting down equations and diagrams. Accessibility options like dynamic text size and VoiceOver support are also included.
This app offers a calculator with an editable, line-by-line tape history, combining spreadsheet-like functionality with calculator simplicity. Easily correct mistakes, add comments, and share or print your calculations.
This app offers a free basic and scientific calculator with an intuitive interface. It supports fractions, percentages, and advanced editing. Optional upgrades provide specialized calculators for fractions with units, polynomial and linear equation solving, graphing, and geometric shapes.
This utility app offers a clean and intuitive interface for performing calculations. It prioritizes a user-friendly design with large buttons and a clear display for quick and efficient use.
This app offers a powerful scientific calculator with a wide range of functions for trigonometry, statistics, and combinatorics. Users can define and evaluate their own functions, assign values to variables, and view multiple expressions simultaneously. It works offline and is completely free to use.
This app offers both basic and scientific calculation modes with over 30 scientific operations. It allows for customization of the app's appearance and includes features for note-taking, drawing, and viewing calculation history. It supports high accuracy calculations and nested parentheses.
Access a comprehensive suite of financial tools for personal and business use. Calculate loans, mortgages, investments, retirement savings, and more with ease. This app offers a wide range of specialized calculators for detailed financial analysis.
This app offers a clean and intuitive interface for both basic arithmetic and advanced scientific calculations. It includes a history tape to review past computations and supports various mathematical operations, making it suitable for everyday use and complex problem-solving.
This app offers a versatile calculator with three distinct modes: Basic, Scientific, and Programmer. It provides a history view, sharing capabilities, and supports various input and output formats. The app is designed for iPhone, iPad, and iPod Touch.
This app offers a customizable and fast calculator experience with a wide variety of themes. It includes scientific and standard modes, real-time results, and calculation history. Personalize your math with over 60 cute and colorful themes, including animated options.
This application serves as a versatile tool for both mathematical calculations and real-time currency exchange. It offers a straightforward interface for everyday financial tasks and international currency conversions.
A straightforward calculator app designed for simplicity, offering basic arithmetic operations and percentage calculations. It allows users to record and recall past results, customize colors, and enable touch sounds for a personalized experience.
This app offers both basic and advanced scientific calculations with an intuitive interface designed for tablets and phones. It includes features like currency conversion, calculation history, and the ability to share results. An optional premium membership removes ads and provides enhanced support.
Easily perform fraction calculations including addition, subtraction, multiplication, and division. Convert fractions to decimals and vice versa with a clear, user-friendly interface. Ideal for students, cooks, and DIYers needing quick and accurate fraction management.
This app offers a comprehensive suite of 10 powerful calculators and 10 financial worksheets, designed to handle everything from basic arithmetic to complex scientific and financial calculations. It includes features like unit conversion, currency exchange, graphing, and statistical analysis, making it a versatile tool for students and professionals.
This app offers a powerful graphing calculator experience with touch-based input for enhanced interaction. It supports natural textbook notation, advanced math functions, and various plotting capabilities. Users can also utilize its programming features and built-in tools like unit conversion and a periodic table.
This app simplifies math with basic, scientific, and fraction calculations. It also features a unique snap-and-scribble function to solve problems from photos. Customize your experience with themes and access a calculation history.
This app offers a straightforward calculation experience, focusing on essential functions without unnecessary complexity. It includes basic arithmetic, percentage calculations, and advanced functions like square root. Users can customize the appearance with multiple color schemes and utilize features like result copying and split-screen multitasking on iPad.
This app offers a smart calculator experience across iPad, iPhone, and Apple Watch. It features a history of calculations, the ability to edit equations, and a convenient dark mode. Easily share your results and enjoy enhanced productivity with its user-friendly interface.