# Rule of Three > Learn and calculate proportions instantly with the Rule of Three. Canonical page: [https://chrome-stats.com/d/com.simplernapp](https://chrome-stats.com/d/com.simplernapp) ## Overview - **ID:** `com.simplernapp` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** Andre Pestana - **Category:** EDUCATION - **Downloads:** 20 - **Version:** 2.0 - **Last updated:** 2025-11-28 - **First published:** 2025-11-27 - **Publisher country:** CA - **Size:** 33 MB - **Data as of:** 2026-09-08 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.simplernapp) - **Website:** [https://andrepestana.github.io/RuleOfThree](https://andrepestana.github.io/RuleOfThree) - **Privacy policy:** [https://andrepestana.github.io/RuleOfThreePrivacyPolicy](https://andrepestana.github.io/RuleOfThreePrivacyPolicy) ## Description Rule of Three is the simplest and most intuitive way to learn and calculate proportions.
Whether you're a student, a teacher, or someone who needs quick answers for everyday situations, this app helps you understand and apply the Rule of Three with clarity and confidence.

⭐ What is the Rule of Three?

The Rule of Three is an easy method used to solve proportional problems. If you know three values in a proportion, the app helps you instantly find the fourth. It’s useful for math learning, financial calculations, recipe adjustments, unit conversions, and everyday reasoning.

πŸ”’ Key Features
βœ” Easy Calculations

Enter the known values, tap β€œCalculate,” and get your result immediately.
No confusion, no unnecessary steps.

βœ” Learn the Concept

A dedicated Learn section explains the Rule of Three in a fun, simple, and visual way.
You'll discover:

- What the Rule of Three is
- Common real-life examples
- How to calculate step by step
- Interesting history and math facts

Suitable for all ages and skill levels.

βœ” Visual Proportion Display

See your proportion represented with a colorful, easy-to-understand bar chart.
Perfect for visual learners, teachers, and students.

βœ” Shareable Results

Generate a clean, beautiful image of your calculation to share with friends, classmates, or coworkers.
Great for homework, reports, or quick communication.
(Images are created locally and not stored by the app.)

βœ” Designed for Everyone

- Kids
- Adults
- Students
-Teachers
-Professionals
- Anyone needing quick proportional reasoning

The interface is clean, friendly, and suitable both for quick calculations and for learning.

πŸ“š Where is the Rule of Three Used?

- School math problems
- Percentage changes
- Recipe scaling
- Travel and speed planning
- Financial comparisons
- Discounts and prices
- Unit conversions
- Productivity and work planning

If it involves proportions, this app makes it simple.

πŸ”’ Private by Design

The app does not collect personal data, does not track you, and does not require an internet connection to function.
Everything happens on your device.

🎯 Why You'll Love It

- Fast and accurate
- Great for learning or teaching
- Helps build intuitive mathematical thinking
- Clean design
- No distractions
- Works fully offline

Master proportions the easy way.
Download Rule of Three and make proportional reasoning simple, visual, and fun. ## Rankings - #2,595,664 β€” Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_ADSERVICES_AD_ID` - `android.permission.ACCESS_ADSERVICES_ATTRIBUTION` - `android.permission.ACCESS_ADSERVICES_TOPICS` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.FOREGROUND_SERVICE` - `android.permission.INTERNET` - `android.permission.READ_EXTERNAL_STORAGE` - `android.permission.WAKE_LOCK` - `android.permission.WRITE_EXTERNAL_STORAGE` - `com.android.vending.CHECK_LICENSE` - `com.google.android.gms.permission.AD_ID` - `com.simplernapp.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` ## Similar extensions and apps - [Rule of Three](https://chrome-stats.com/d/com.luccastanan.RegraDeTres) β€” 49 users - [Rule of Three Calculator](https://chrome-stats.com/d/com.GAW.ruleofthreecalculator) β€” 146 users - [Rule of Three Calculator](https://chrome-stats.com/d/com.aplicaciones.gastry.regladetres) β€” 53,003 users - [Rule of Three](https://chrome-stats.com/d/regradetres.cursoandroid.com.regradetres) β€” 65,932 users - [Rule of three](https://chrome-stats.com/d/com.epragma.rule_of_three) β€” 53 users - [DreiSatz Rechner](https://chrome-stats.com/d/com.xorcalc.dreisatz_rechner) β€” 776 users - [Rule of Three - Calculator](https://chrome-stats.com/d/com.ruleofthree.regladetres.rule.regla.tres.three.mathematics.matematicas.multiplicator.equation) β€” 4,872 users - [Calculadora Regla de Tres Pro](https://chrome-stats.com/d/com.xorcalc.calculadoraderegladetrespro) β€” 5,612 users - [Regra de 3](https://chrome-stats.com/d/com.embarcadero.regra3) β€” 79 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.simplernapp)