# Adolygu vs GCS Engage

The clearest difference is update cadence: GCS Engage at every 2 weeks against Adolygu's every 18 months. Adolygu's advantage is iOS requirement (6.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Adolygu ships an update every 18 months, GCS Engage every 2 weeks. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Adolygu | GCS Engage |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 109 MB | 28 MB |
| Requires iOS | **6.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Galactig Cyf](https://appshunter.io/developer/1759405647) | [Gower College Swansea](https://appshunter.io/developer/1174306703) |

## What reviewers say

### Adolygu

[App page](https://appshunter.io/ios/app/adolygu-revision/id900110539)

Prepare for GCSE science exams with this free, bilingual app. It offers timed quizzes covering Physics, Chemistry, and Biology, with questions based on university revision guides. Track your progress and identify areas for improvement to achieve a better score.

**Highlights:** GCSE Science quizzes, Timed challenges, Physics, Chemistry, Biology, Progress tracking, Bilingual content, Revision guide access

**Features:** macOS Compatibility

**In-app purchases:** none


### GCS Engage

[App page](https://appshunter.io/ios/app/gcs-engage/id6793133036)

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

**In-app purchases:** none


## Frequently asked questions

### Is Adolygu free?

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

### Is GCS Engage free?

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

### Do Adolygu or GCS Engage have ads?

Neither Adolygu nor GCS Engage shows ads.

### Which is updated more often, Adolygu or GCS Engage?

Adolygu ships an update every 18 months, and GCS Engage every 2 weeks. Most recently, Adolygu was updated on November 1, 2026 and GCS Engage on November 5, 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.*