# RULE-OF-THREE — REGLA DE TRES SIMPLE

> REGLA DE TRES SIMPLE (iPhone/iPad app by Ronald Ledermann.)

- Source: https://appshunter.io/ios/app/rule-of-three/id1556716155 (this page in markdown: same URL + `.md`)
- Developer: [Ronald Ledermann](https://appshunter.io/developer/1556716157)
- Category: Utilities, Productivity
- Price: $0.99
- Age rating: 17+
- Requires: iOS 14.4 · 0 MB
- Languages: English
- Released: 2021-03-19
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/rule-of-three/id1556716155/reviews.md

## What is RULE?

The  best way to explain what the app does is to think that you need to know how much is the 23 % of 1500 pounds, you just put 100(x1) is a 1500 like 23 is a, then the app calculate this automatically, see picture one. Other good example imagen that you have a construction and you know that 20 worker finishing a building  in 10 days, but you need it to finished in 5, so how many workers do you need ??. Just put 10 in variable x1 , 20 in z1  and 5 in x2, see picture 2


## Version history (last 1 release)

### 1.1 — 2021-03-19

No release notes.

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## More apps by Ronald Ledermann

- [Xpences](https://appshunter.io/ios/app/xpences/id1669594360)

All apps by Ronald Ledermann: https://appshunter.io/developer/1556716157

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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 2026-05-19.*