192+ iOS apps & games curated and reviewed
Every iPhone needs a few good regra de 3 apps and games. We benchmark 192+ 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 | 5.0★ (2) | No | Yes | May 2026 | |
| 3 |  | Free | — | — | No | Aug 2026 | |
| 4 |  | Free | — | — | No | May 2026 | |
| 5 |  | Free | 4.3★ (106) | Yes | Yes | Sep 2026 | |
| 6 |  | Free | 4.6★ (106) | No | Yes | Sep 2026 | |
| 7 |  | Free | 5.0★ (4) | Yes | No | Jul 2026 | |
| 8 |  | Free | — | Yes | No | May 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.
Easily calculate the Rule of Three for everyday numerical problems. This app also helps you compare different values, measures, weights, and volumes.
