# Correlation Coefficient vs EngGym

The clearest difference is price: EngGym at Free against Correlation Coefficient's $0.99. Correlation Coefficient's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement there is nothing between them.

EngGym is free to download; Correlation Coefficient costs $0.99 up front. EngGym sells 2 in-app purchases, starting at $5.99 per month. Correlation Coefficient asks for nothing beyond the download.

## The numbers

| Metric | Correlation Coefficient | EngGym |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/enggym-all-in-one-learning/id6749172819/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Weekly |
| Monetization | — | Free with in-app purchases |
| Size | 1 MB | 106 MB |
| Requires iOS | **16.5** | 16.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Basel AbuTaleb](https://appshunter.io/developer/1604005525) | [EngGym](https://appshunter.io/developer/1829089211) |

## What reviewers say

### Correlation Coefficient

[App page](https://appshunter.io/ios/app/correlation-coefficient/id6473872692)

**Features:** macOS Compatibility

**In-app purchases:** none


### EngGym

[App page](https://appshunter.io/ios/app/enggym-all-in-one-learning/id6749172819)

This app offers a comprehensive English learning experience, focusing on reading, writing, listening, and speaking. It utilizes adaptive AI to provide instant feedback, personalized study plans, and real-world content for efficient improvement.

**Highlights:** AI-powered feedback, Personalized study plans, Real-world content, Comprehensive skill training, Gamified learning

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly Plan | $5.99 | per month |
| Premium Yearly Plan | $39.99 | per year |


## Frequently asked questions

### Is Correlation Coefficient free?

Correlation Coefficient costs $0.99, with no in-app purchases.

### Is EngGym free?

EngGym is free to download, with in-app purchases available.

### Do Correlation Coefficient or EngGym have ads?

Neither Correlation Coefficient nor EngGym shows ads.

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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.*