# Proportion_Calculator vs ECA Directory

The clearest difference is update cadence: ECA Directory at weekly against Proportion_Calculator's every 24 months. ECA Directory also leads on device support (4 vs 2). Proportion_Calculator's advantage is iOS requirement (13.0 vs 26.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Proportion_Calculator ships an update every 24 months, ECA Directory weekly. The most recent releases landed on October 15, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Proportion_Calculator | ECA Directory |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (2 ratings)](https://appshunter.io/ios/app/proportion-calculator/id1601421898/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Weekly** |
| Monetization | Free | — |
| Size | 19 MB | 27 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Ahmad Sattar](https://appshunter.io/developer/1458483953) | [Daniel Flax](https://appshunter.io/developer/405668514) |

## What reviewers say

### Proportion_Calculator

[App page](https://appshunter.io/ios/app/proportion-calculator/id1601421898)

This app helps you find the unknown value in proportions by showing step-by-step calculations. It's useful for various applications, from cooking to science, and offers a simple, fast, and visually appealing way to solve proportion problems.

**Highlights:** Solves for unknown values in proportions, Provides labeled step-by-step explanations, Fast calculation speed, User-friendly interface, Math keyboard for easy input, Smart, eye-friendly color theme

**Features:** macOS Compatibility

**In-app purchases:** none


### ECA Directory

[App page](https://appshunter.io/ios/app/eca-directory/id6755077125)

**In-app purchases:** none


## Frequently asked questions

### Is Proportion_Calculator free?

Proportion_Calculator is free to download, with no in-app purchases.

### Is ECA Directory free?

ECA Directory is free to download, with no in-app purchases.

### Do Proportion_Calculator or ECA Directory have ads?

Neither Proportion_Calculator nor ECA Directory shows ads.

### Which is updated more often, Proportion_Calculator or ECA Directory?

Proportion_Calculator ships an update every 24 months, and ECA Directory weekly. Most recently, Proportion_Calculator was updated on October 15, 2026 and ECA Directory on September 28, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*