Best Rule Of Three Calculator Apps & Games

218+ iOS apps & games curated and reviewed

4.5 avg rating
17 free apps & games
Updated June 2026

Every iPhone needs a few good rule of three calculator apps. We benchmark 218+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Top Picks for Rule Of Three Calculator

More Rule Of Three Calculator apps to explore

4
Calculator‰
Calculator‰
Calculator‰
Default Calculator
Free

Experience a beautifully designed calculator with large buttons and a clear display for quick and efficient calculations. Try it now to discover the simplicity and ease of use for your everyday arithmetic needs.

🔧 Utilities
(404K)
5
Calculator·
Calculator·
Calculator·
Big Basic Calculator
Free

A simple and intuitive calculator app with essential functions like addition, subtraction, multiplication, and more. Customize with multiple color schemes, copy results easily, and use additional functions on iPad. Experience the perfect balance of features and simplicity today!

🔧 Utilities
(33K)
6
Rule of 3 - Lite
Rule of 3 - Lite
Rule of 3 - Lite
The quick ratio calculator
Free

This application helps you perform product multiplication calculations quickly and easily, allowing you to copy results to the clipboard with a shortcut button. You can also save calculations and view them in your history, making it a useful tool for tracking and referencing your work.

📊 Productivity
(20)
7
Best Proportion Calc
Best Proportion Calc
Best Proportion Calc
Simple and quick calculation
Free

This proportion calculator app makes math easy and fun, allowing users to quickly solve equations using the cross product method. With its intuitive interface, versatility, and offline capabilities, it's perfect for students, professionals, and anyone looking to simplify their calculations - download now and start solving problems with ease!

📊 Productivity
(4)
8
Calculator for iPad₊
Calculator for iPad₊
Calculator for iPad₊
Basic, Scientific, Plus Calc
Free

A powerful math solver and scientific calculator for iPad and iPhone, featuring advanced functions and quick calculations. Share your results easily and master your business expenses with percentage calculations. Get it now!

🔧 Utilities
(126K)
9
Aspect Ratio Pro
Aspect Ratio Pro
Aspect Ratio Pro
Rule of Three Calculator
$3.99

This application helps users calculate ratios and proportions by entering three values to instantly find the fourth, making it a useful tool for solving rule-of-three problems. Try it out to simplify your calculations and get accurate results with ease.

🔧 Utilities
(1)
10
Calculator: The Game
Calculator: The Game
Calculator: The Game
An amazing numerical journey
Free

Embark on a unique numerical journey with an innovative calculator game where you solve puzzles by manipulating numbers in creative ways. Immerse yourself in a world of portals, snarky assistants, and challenging equations. Try it now!

🎮 Games
(1.1K)
11
Color Calculator-smart&cute
Color Calculator-smart&cute
Color Calculator-smart&cute
Cute calculator app with theme
Free

A color calculator app that helps users find complementary color schemes for design projects. Simply input a base color and let the app generate harmonious color combinations for your projects. Try it now to elevate your design choices!

🔧 Utilities
(15K)
12
Calculator with History +
Calculator with History +
Calculator with History +
No ads & Scientific calculator
Free

A calculator app with a built-in history feature that keeps track of your calculations without any ads. Calculate effortlessly and access your past computations instantly.

💰 Finance
(23K)
13
Basic Calculator+
Basic Calculator+
Basic Calculator+
Basic Four Function Calculator
Free

A user-friendly basic four-function calculator with a clear display and large buttons for easy calculations, available on both portrait and landscape modes. Download now for a straightforward and efficient way to handle your math tasks!

🔧 Utilities
(243K)
14
Graphing Calculator Plus AI
Graphing Calculator Plus AI
Graphing Calculator Plus AI
Scientific Graphing Calculator
$5.99

An advanced scientific graphing calculator app that is user-friendly and suitable for basic to advanced mathematics, offering a powerful math core and extensive support features. Ideal for engineers, math students, and more, with built-in documents for various calculations. Explore the world of advanced mathematics with ease and efficiency.

📚 Education
(12K)
15
Desmos Scientific Calculator
Desmos Scientific Calculator
Desmos Scientific Calculator
by Desmos, Inc.
Free

Explore a powerful scientific calculator with functions beyond basic arithmetic - trigonometry, statistics, and combinatorics. Create and evaluate custom functions, work offline, view multiple expressions at once, and enjoy a seamless user experience - all for free.

📚 Education
(327)
16
Calculator - Free Calculator
Calculator - Free Calculator
Calculator - Free Calculator
by 祥祎 刘
Free

Calculator - Free Calculator is a versatile and user-friendly app designed for iPad. Perform a wide range of calculations effortlessly with its optimized features. Download now to streamline your calculations on the go!

🔧 Utilities
(1.4K)
17
Sci:Pro Calculator
Sci:Pro Calculator
Sci:Pro Calculator
by Jerry Montgomery
Free

A versatile calculator app with Basic, Scientific, and Programmer modes for iPhone, iPad, and iPod Touch. Easily view history and share results via email or copy. Get precise calculations on-the-go!

🔧 Utilities
(3.6K)
18
GraphNCalc83
GraphNCalc83
GraphNCalc83
Graphing calculator
$12.99

The app is a comprehensive graphing calculator that features algebraic entry, math functions, graph plotting, statistics, matrix operations, unit conversion, BASIC programming, chemistry tools, geometry calculations, finance functions, and a built-in user guide for easy reference. It offers a colorful, fast, and fluid experience on iPhone and iPad with advanced features like touch input, high-resolution graph outputs, and fast computation speeds. Explore its diverse functionality to enhance your mathematical tasks.

📚 Education
(3.8K)
19
Calculator Pro Lite
Calculator Pro Lite
Calculator Pro Lite
Best Calculator
Free

A versatile and customizable calculator app offering basic and scientific functions, memory features, history tape, and various layout options. Users can personalize their color themes, access scientific functions, and easily perform complex calculations, all with ad-supported convenience. Explore the app now for a powerful and user-friendly calculation experience!

🔧 Utilities
(3K)
20
Calculator₊
Calculator₊
Calculator₊
Basic, Scientific, Plus Calc
Free

Try Calculator₊, the ultimate mathematics tool offering basic, scientific, and plus calculations. Ideal for homework, exams, and managing expenses, this app is like having a personal math tutor on your phone. Download now for easy and intuitive math solutions!

🔧 Utilities
(1.7M)

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