96+ iOS apps & games curated and reviewed
Every iPhone needs a few good Rule of Three apps and games. We benchmark 96+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 5.0★ (1) | Yes | No | Sep 2026 | |
| 2 |  | Free | 2.3★ (4) | No | Yes | May 2026 | |
| 3 |  | Free | — | Yes | No | May 2026 | |
| 4 |  | Free | 5.0★ (4) | Yes | No | Jul 2026 | |
| 5 |  | Free | — | No | Yes | Aug 2026 | |
| 6 |  | $3.99 | 4.0★ (1) | No | No | Aug 2026 | |
| 7 |  | Free | 4.8★ (20) | No | Yes | Aug 2026 | |
| 8 |  | Free | 5.0★ (3) | No | No | Jul 2026 |
This utility app simplifies calculations involving proportional quantities, commonly known as the rule of three or cross-multiplication. It helps solve everyday problems like adjusting recipe ingredients or calculating fuel consumption quickly and easily.
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.
Instantly calculate proportions and simplify everyday math problems with this app. It features a recipe scaler to adjust ingredients and a rule of three calculator for quick, accurate solutions. An intuitive Q&A tool also helps solve homework-style questions.
