# RatioStep: Ratio Calculator — Rule of Three, Explained

> Rule of Three, Explained (iPhone/iPad app by Gianfranco Gasbarri.)

- Source: https://appshunter.io/ios/app/ratiostep-ratio-calculator/id6806571249 (this page in markdown: same URL + `.md`)
- Developer: [Gianfranco Gasbarri](https://appshunter.io/developer/6806571251)
- Category: Utilities, Education
- Price: Free
- Age rating: 4+
- Requires: iOS 18.0 · 1 MB
- Languages: American English, European Portuguese, European Spanish
- Released: 2026-09-01
- Data updated: 2026-10-05

## What is RatioStep?

Enter three values. Get the missing value and see how to calculate it. Then try a similar problem with hints.

RatioStep solves direct and inverse proportions for recipes, quantities, and homework. See a mental shortcut suited to your numbers or follow the arithmetic step by step.

CALCULATE
- Solve for any of the four values.
- Switch between direct and inverse proportion.
- Copy the answer or paste a value.

UNDERSTAND AND PRACTICE
- See a mental shortcut adapted to your calculation.
- Follow the formal method step by step.
- Try a similar problem with hints and an option to reveal the answer.
- Practice without timers, scores, or streaks.

MAKE IT YOURS
- Choose a row or stacked layout.
- Set the display precision from one to six decimal places.
- Use English, Spanish, or Portuguese (Portugal).

Calculations and practice work offline. No account, ads, tracking, purchases, or subscription. Your preferences stay on your device.

Enter your three values to get started.

Requires iOS 18 or later.

## Is RatioStep safe?

Not enough ratings yet to assess RatioStep.

## Is RatioStep legit?

RatioStep: Ratio Calculator has limited verification signals. The AppsHunter Legitimacy Score for RatioStep is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 3 releases)

### 2.0.1 — 2026-09-28

Fixed pasting negative numbers and numbers that use both decimal and thousands separators. Invalid pasted text now leaves your existing value unchanged.

### 2.0 — 2026-09-02

RatioStep 2.0 adds a redesigned one-screen calculator and a new Learn flow.

- See a mental shortcut tailored to your numbers.
- Try a similar practice problem with hints and answer reveal.
- Switch between direct and inverse proportion from the calculator.
- Use improved input, clearer feedback, optional haptics, and better Dynamic Type support.

### 1.0 — 2026-09-01

No release notes.

## Apps similar to RatioStep

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [MixRatio: Dilution Mixer](https://appshunter.io/ios/app/mixratio-dilution-mixer/id6790220353) | — | Free | Utilities |
| [Ratio Calculator Pro](https://appshunter.io/ios/app/ratio-calculator-pro/id6463126280) | — | Free | Utilities |
| [CalcKit](https://appshunter.io/ios/app/calckit/id321006774) | — | Free | Utilities |
| [nubi city rooms](https://appshunter.io/ios/app/nubi-city-rooms/id6443933977) | 2.7 (7) | Free | Utilities |
| [AirDroid Business](https://appshunter.io/ios/app/airdroid-business/id1514551384) | 2.5 (2) | Free | Utilities |
| [Mute Video - Video Mute](https://appshunter.io/ios/app/mute-video-video-mute/id1462415704) | 4.8 (437) | Free | Utilities |

---

*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 2026-10-05.*