# Compare - Rule of 3

> Utility app for Rule of Three calculations and value comparisons. (iPhone/iPad app by Paulo Moreno.)

- Source: https://appshunter.io/ios/app/compare-rule-of-3/id981628609 (this page in markdown: same URL + `.md`)
- Developer: [Paulo Moreno](https://appshunter.io/developer/719690236)
- Category: Utilities
- Price: Free with in-app purchases
- Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 42 MB
- Languages: English, Portuguese
- Released: 2015-05-04
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/compare-rule-of-3/id981628609/reviews.md

## What is Compare?

Compare offers you an easy way of calculating the Rule of Three to solve the various numerical challenges of everyday life. Compare also gives you an easy way of comparing values and measures.

Rule of Three:
The rule of three is a practical process for solving problems that involve 4 values of which 3 are known.

Weight, Unit and Volume:
We can also help you comparing different values, measures, weights and volumes.

## Key features

- Rule of Three calculation
- Value comparison
- Measure comparison
- Weight comparison
- Volume comparison

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/compare-rule-of-3/id981628609/reviews.md

### 2/5 — Unexpected, extra functions…

*2022-05-13*

…A most welcome bonus!
But it's downhill from here.

There needs to be an option to choose a plain background to get rid of the pointless, useless, tacky, interfering graphics. Some fonts are difficult to read; and the tiny entry / readout windows reduce what really matters to something requiring a magnifying glass. -What a huge waste of space!

Further disappointment:
• No rotation to landscape orientation exacerbates all of the above.
• The generic $ sign seems to assume users will be from the U.S.A. - or perhaps that the rest of the world doesn't really matter…
• And then there's the sadvertising banner (sic).

Alas, some superb functionality is shrouded in awkwardness, almost as if the app wants an argument.

## Frequently asked questions about Compare

### What is the Rule of Three in Compare?

The Rule of Three is a practical process for solving problems that involve four values where three are known. Compare provides an easy way to perform these calculations.

### Can Compare help with units of measurement?

Yes, Compare helps you compare different values, measures, weights, and volumes, making it useful for various unit conversions and comparisons.

### What devices does Compare support?

Compare is available on iPhone, iPad, and iPod devices, offering its utility across Apple's mobile ecosystem.

### How often is Compare updated?

The latest version of Compare is 1.2, which was last updated on October 4, 2018. Users can expect a stable experience with this version.

### What is the age rating for Compare?

Compare has an age rating of 4+, making it suitable for a wide range of users, including younger individuals who are learning basic math concepts.

### Is Compare free to use?

Compare is available for free, allowing all users to access its features without any upfront cost.

### What is the user rating for Compare?

Compare has received an excellent rating of 5.0 stars from 2 ratings, indicating high user satisfaction with its functionality.

### Does Compare have ads?

No, Compare does not contain advertisements, providing an uninterrupted user experience for calculations and comparisons.

## Version history (last 3 releases)

### 1.2 — 2018-10-04

iOS 12 update

### 1.1 — 2017-05-31

- 3D Touch support
- Added english as a supported language
- Fixed a bug on the iPad tab bar

### 1.0 — 2015-05-02

No release notes.

## Apps similar to Compare

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Date Calendar Calculator](https://appshunter.io/ios/app/date-calendar-calculator/id1472858405) | 4.9 (28) | Free | Utilities |
| [Fluxin](https://appshunter.io/ios/app/fluxin/id1486166897) | 4.0 (1) | Free | Utilities |
| [InvestSUS Cidadão](https://appshunter.io/ios/app/investsus-cidadao/id1471696623) | — | Free | Utilities |
| [Rule of Three Easy](https://appshunter.io/ios/app/rule-of-three-easy/id1553014021) | 5.0 (1) | Free | Utilities |
| [TBDC Consultoria](https://appshunter.io/ios/app/tbdc-consultoria/id1444679255) | — | Free | Utilities |
| [Regra de 3 Pro](https://appshunter.io/ios/app/regra-de-3-pro/id6474170026) | — | Free | Utilities |

## Related topics

[regra de 3](https://appshunter.io/ios/topics/regra-de-3) · [regra de 3 pro](https://appshunter.io/ios/topics/regra-de-3-pro)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*