# Rule of 3: AI Calculator — Smart Proportion Ratio Solver

> Smart Proportion Ratio Solver (iPhone/iPad app by Juan Antonio Veloz Gutierrez.)

- Source: https://appshunter.io/ios/app/rule-of-3-ai-calculator/id6754204202 (this page in markdown: same URL + `.md`)
- Developer: [Juan Antonio Veloz Gutierrez](https://appshunter.io/developer/1810351183)
- Category: Utilities, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 139 MB
- Languages: American English
- Released: 2025-11-03
- Data updated: 2026-07-29
- User reviews in markdown: https://appshunter.io/ios/app/rule-of-3-ai-calculator/id6754204202/reviews.md

## What is Rule of 3?

Solve proportions instantly. Our app is the fast and easy way to master the Rule of 3.

Tired of complex math apps? We designed this calculator to be the fastest, most intuitive tool for solving proportions, ratios, and percentages. Whether you're a student needing a step-by-step homework check, a designer calculating aspect ratios, or just need to solve a cross multiplication problem quickly, this is the app for you.

FEATURES:


BLAZING FAST & EASY Our minimalist interface is clean and clutter-free. Enter your values and get an instant result. No complicated buttons, no lag.

YOUR GO-TO MATH TOOL From simple percentage calculations to complex ratio problems, this is the one tool you'll need. It's powerful, simple, and always ready.

Download now and make math simple!

PRO FEATURES

ELEGANT DARK MODE Study or work comfortably in any lighting. Our beautiful Dark Mode is easy on the eyes, perfect for late-night sessions or use in any professional setting.

AI EXPLANATIONS (New!) Don't just get the answer—understand it. Our revolutionary AI feature provides a clear, step-by-step breakdown of the calculation. It instantly tells you if the problem is a direct or inverse proportion and explains why, making it the perfect educational tool.


A subscription is needed to unlock PRO features including Dark mode and AI Explanation. Payment will be charged to your Apple ID account upon confirming the purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel your subscription at any time from your account settings in the App Store.

Read the EULA Terms in the following link https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| PRO Rule of Three Calculator Weekly | $4.99 | per 7 days |
| PRO Rule of Three Calculator Yearly | $7.99 | per year |



## Version history (last 1 release)

### 1.0 — 2025-11-04

No release notes.

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## More apps by Juan Antonio Veloz Gutierrez

- [Quadratic Equation AI Solver](https://appshunter.io/ios/app/quadratic-equation-ai-solver/id6744992645)
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- [Sarrus Calculator Matrix Det](https://appshunter.io/ios/app/sarrus-calculator-matrix-det/id6745130843)
- [Area Calculator: AI Solver](https://appshunter.io/ios/app/area-calculator-ai-solver/id6745148692)
- [All in One Calculator - Math](https://appshunter.io/ios/app/all-in-one-calculator-math/id6745767970)

All apps by Juan Antonio Veloz Gutierrez: https://appshunter.io/developer/1810351183

## Related topics

[rule of three calculator](https://appshunter.io/ios/topics/rule-of-three-calculator) · [rule of three easy](https://appshunter.io/ios/topics/rule-of-three-easy)

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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 2026-07-29.*