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Interface is perfectly simple but often when doing rule of thirds calculations is for comparisons. A button to clear all boxes would make it perfect for a better use.

This utility app helps you solve problems involving ratios and proportions. It calculates an unknown number based on the relationship between two other known numbers.
1.1
December 14, 2016
This app has been updated by Apple to display the Apple Watch app icon.
$0.99
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The Rule of Three Calculator is used to find an unknown number when you know the relationship between two other pairs of numbers. It's helpful for solving problems involving ratios and proportions.
Yes, the Rule of Three Calculator is available for free. It does not require any payment to download or use its core functionality.
The Rule of Three Calculator is designed for Apple devices, including iPhone, iPad, and iPod. It is not available on Android or other operating systems.
The Rule of Three Calculator was last updated on December 14, 2016, with version 1.1. There have been no updates since then.
The Rule of Three Calculator has an age rating of 4+. This indicates it is suitable for users aged four and above.
No, the Rule of Three Calculator does not contain advertisements. As it is a free app, this is a notable aspect of its user experience.
The Rule of Three Calculator has a user rating of 2.3 stars, based on 4 ratings. This suggests a mixed to negative user reception.
Yes, the Rule of Three Calculator does have in-app purchases available. However, the specific items or features offered through these purchases are not detailed.