249+ iOS apps curated and reviewed
From beginner-friendly picks to power-user tools, our riemann sums calculator list covers 249+ iPhone apps updated through August 2026. Compare ratings, prices, and screenshots in one place.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 5.0★ (2) | No | No | Aug 2026 |
| 2 |  | Free | 4.9★ (409K) | Yes | No | Aug 2026 |
| 3 |  | Free | 4.7★ (61K) | No | No | Aug 2026 |
| 4 |  | Free | 4.6★ (36K) | Yes | Yes | Aug 2026 |
| 5 |  | Free | 4.4★ (3.6K) | Yes | No | Aug 2026 |
| 6 |  | $5.99 | 4.7★ (6.3K) | No | Yes | Aug 2026 |
| 7 |  | Free | 4.5★ (126K) | Yes | Yes | Aug 2026 |
| 8 |  | Free | 4.3★ (332) | No | No | Aug 2026 |
This app approximates integrals using Riemann summation techniques. Input your function and range, then choose from four methods: Left, Right, Middle, or Trapezoid. It supports common functions and constants.
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 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.
This multi-function calculator offers basic to advanced scientific and algebraic computations. It includes features like handwriting recognition, equation solvers, and 2D graphing, making it suitable for students and professionals. In-app purchases unlock advanced capabilities.
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 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.
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.
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 is a powerful and intelligent calculator with a smart UI and live results. It offers basic, advanced, and scientific functions, a history log, customizable themes, and user-definable functions. It also includes features like an on-screen timer and iPad multitasking support.
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 app offers both basic and scientific calculators for quick solutions to mathematical expressions. It also features a "Math Notes" function that allows users to type or write out equations and see them solved inline, with support for variables and graphing.
This app offers a comprehensive scientific calculator with advanced functions for math, finance, and engineering. It includes unit and currency conversion, a constants library, and a biorhythm calculator for daily insights. The interface is intuitive and supports multiple calculation modes.
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.
This app offers a straightforward calculator with a large display and oversized buttons for easy operation. It's designed for everyday tasks, enabling users to perform fundamental arithmetic like addition, subtraction, multiplication, and division with clarity and convenience.
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.
A straightforward and user-friendly calculator designed for iPhone and iPad. It offers standard calculation logic, basic math operations, and a history display for convenience. Optimized for a simple and efficient user experience.
This ad-free utility offers a clean and intuitive interface for performing calculations. It includes essential features like a backspace button and support for parentheses, making complex equations manageable. Enjoy a streamlined calculation experience without interruptions.
This app redefines the calculator experience for touch-screen devices with a modern, intuitive design. It offers features like a tape log for storing calculations, formula evaluation, and iPad multitasking support for enhanced productivity.
This application calculates and graphs mathematical formulas with multiple variables. It allows for programming complex equations, plotting graphs with variable manipulation, and saving frequently used formulas. It also generates tables of results for easy export.
This app calculates definite and indefinite integrals of mathematical functions, including trigonometric and logarithmic types. It provides step-by-step solutions, visual representations, and Riemann sums for a comprehensive understanding of integration. Users can easily input functions and specify integration variables and bounds.