167+ iOS apps curated and reviewed
The best a complex calc apps on iPhone average 4.6★ across 167+ titles — we've ranked them by what real users actually keep on their phones. Updated July 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.7★ (23) | No | No | Jul 2026 |
| 2 |  | Free | 5.0★ (2) | No | No | May 2026 |
| 3 |  | Free | 4.6★ (9.6K) | Yes | Yes | Jul 2026 |
| 4 |  | Free | 3.8★ (22) | No | No | Jul 2026 |
| 5 |  | Free | 4.5★ (126K) | Yes | Yes | Jul 2026 |
| 6 |  | Free | 3.9★ (28) | No | No | May 2026 |
| 7 |  | Free | 4.7★ (492) | Yes | Yes | Jul 2026 |
| 8 |  | Free | 4.8★ (3.1K) | Yes | Yes | Jul 2026 |
Perform complex calculations with a modern, user-friendly interface. Offers both basic and scientific modes, including support for complex numbers and advanced functions. This lightweight application provides a history of computations and is completely free with no advertisements.
Perform advanced calculations with complex numbers, including conversions between rectangular and exponential forms. Features quick copy-paste functionality and automatic dark mode for a seamless user experience.
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 scientific calculator utilizes a four-level stack and natively handles complex numbers. It allows users to input and view numbers in both polar and rectangular formats, remembering its state and offering 10 memory locations.
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.
A visually appealing and straightforward calculator app for iPhone and iPad. It offers a unique user interface with support for basic and scientific calculations, various number base conversions, and currency and unit conversions.
This app offers a powerful and precise calculator for everyday math and advanced scientific computations. It features a clean interface with large buttons, supporting complex equations, multiple modes, and intuitive input methods. Personalize your experience with colorful skins and custom icons.
A free, classic calculator app with large, easy-to-press buttons and customizable skins. It supports basic arithmetic, memory functions, and can handle very large numbers without using scientific notation. Multitasking is also supported on compatible devices.
A straightforward and intuitive calculator app designed for ease of use. It offers a history bar, customizable themes, and advanced mathematical functions, ensuring a pleasant and efficient calculation experience on your device.
Solve math problems instantly by taking a photo or typing your question. Get step-by-step solutions for algebra, graphing, calculus, and more. Understand complex math concepts with unlimited access to answers.
This advanced RPN scientific calculator offers workstation-class Computer Algebra System (CAS) capabilities, going beyond traditional replicas. It provides access to an extensive library of modules and programs, enhanced with iOS features, customizable skins, and iCloud support for seamless data management.
A powerful calculator designed for professionals and students, offering advanced features like RPN mode, multi-line display, and extensive unit conversions. It supports various number systems and includes an Apple Watch app for on-the-go calculations.
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 offers a free, powerful alternative to hardware graphing calculators. It supports basic to complex math, including graphing, statistics, and matrix operations, with a built-in user manual for assistance.
This comprehensive calculator app offers advanced scientific, graphing, and matrix functions. It includes tools for solving equations, performing statistical analysis, and converting units. A built-in reference guide covers various math and science topics.
This application allows users to easily graph functions and equations, identify key points, and share their work. It's a powerful tool for learning math and science, offering features like regression and access to learning activities.
This app offers instant calculations as you type, eliminating the need for an equals button. Its notepad-style interface allows for multiple calculations at once, with smart result reuse for efficiency. It's a free, user-friendly tool for everyday math, schoolwork, and professional tasks.
Solve any math problem by typing it in or taking a photo. Get step-by-step solutions for subjects from pre-algebra to calculus. This AI-powered tool offers personalized learning and insights for over 300 million users.
A smart and powerful calculator designed for ease of use, offering advanced scientific functions, unit and currency conversion, and a supercharged history tape. It adapts to various devices and supports external keyboards for enhanced functionality.
This advanced calculator app offers a powerful math core and algebra engine for basic to complex calculations. It includes features like step-by-step solutions, handwriting recognition, and 2D graphing, making it suitable for students, engineers, and programmers.