Ratio & Proportion Calculator

Ratio & Proportion Calculator

Complete solution, all steps

16 ratings
6 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • February 1, 2020
  • July 16, 2026

Features

Ratio & Proportion Calculator screenshot #1 for iPhone
Ratio & Proportion Calculator screenshot #2 for iPhone
Ratio & Proportion Calculator screenshot #3 for iPhone
iphone
ipad
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About

Easily solve proportion problems by entering three of the four variables. This app provides detailed step-by-step solutions and saves all your calculations in a history for later review. Fractions, decimals, and constants are supported.

โœ“Solve proportions with 3 variables
โœ“Detailed solution steps
โœ“Calculation history
โœ“Supports fractions and decimals
โœ“Option to remove ads
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What's New in Ratio & Proportion Calculator

3.2.1

July 16, 2026

Maintenance update. Improving performance.

3

In-App Purchases

$1.99

Remove Ads

Ads will be removed.

User reviews

Steals money

Charged money without consent

Response from developer

Hello CrazyAnt Studio, I (The Dev) apologize for the malfunctioning system. Finally I was able to fully rework this system so that no consent is required anymore. Third party advertisements systems has been removed compeltely. No money charge can pop up anymore. But to make sure that it is no misunderstanding - just charging money without accepting the purchase should not be possible. Let me know if there is anything else beside the privacy consent. Kind regards

Great app!!

The way this app helps you solve is great !

Response from developer

Hello Tricia, nice to hear that we made good work! Thanks a lot and kind regards!

Works perfectly

This is amazing thank you

Response from developer

Thank you for your great feedback!

anonymous ๐Ÿ˜€

love โค๏ธ

Response from developer

Thank you for your positive review!

Good app

Works as advertised

Response from developer

Thank you very much for your positive comment!

Developer apps

FAQ

How does Rule of Proportion work?

You enter three of the four variables in a proportion problem, and the app calculates the missing value. It provides detailed steps for each calculation and stores them in a history.

What types of numbers can I enter in Rule of Proportion?

Rule of Proportion supports entering fractions and decimals, as well as constants. This flexibility allows for a wide range of proportion problems to be solved.

Can I see my past calculations in Rule of Proportion?

Yes, all calculations are saved in a history function. You can view, delete, or manually sort entries in the history, and select an entry to load it automatically for recalculation.

Does Rule of Proportion have ads?

No, Rule of Proportion does not contain advertisements. There is an option to remove ads, indicating the app is ad-free by default.

What devices is Rule of Proportion available on?

Rule of Proportion is available on iPhone, iPad, and iPod. It is designed for iOS devices.

How often is Rule of Proportion updated?

The latest version is 3.0.0, last updated on February 18, 2026. This indicates a recent update, suggesting the app is actively maintained.

What is the age rating for Rule of Proportion?

Rule of Proportion has an age rating of 4+. This means it is suitable for children aged 4 and above.

How do I share my solutions from Rule of Proportion?

The app allows you to share the final solution of your proportion calculations. This feature is useful for students or professionals who need to present their work.