# Chemical Structures Quiz vs iGyn U

The clearest difference is price: iGyn U at Free against Chemical Structures Quiz's $3.99. iGyn U also leads on update cadence (fortnightly vs every 2 months) and iOS requirement (9.0 vs 11.0). On ads, in-app purchases and device support there is nothing between them.

iGyn U is free to download; Chemical Structures Quiz costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Chemical Structures Quiz ships an update every 2 months, iGyn U fortnightly. The most recent releases landed on October 2, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Chemical Structures Quiz | iGyn U |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Paid | — |
| Size | 12 MB | 2 MB |
| Requires iOS | 11.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Marijn Dillen](https://appshunter.io/developer/1276712320) | [sg-pages](https://appshunter.io/developer/373384745) |

## What reviewers say

### Chemical Structures Quiz

[App page](https://appshunter.io/ios/app/chemical-structures-quiz/id1397168183)

Test your knowledge of organic and biochemical compounds with multiple-choice quizzes. Learn systematic and common names for hydrocarbons, functional groups, and biomolecules. Ideal for high school students studying chemistry.

**Highlights:** Multiple-choice quizzes, Learn systematic and common names, Covers hydrocarbons, functional groups, biomolecules, Offline functionality, No advertisements

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

**In-app purchases:** none


### iGyn U

[App page](https://appshunter.io/ios/app/igyn-u/id1453711806)

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

**In-app purchases:** none


## Frequently asked questions

### Is Chemical Structures Quiz free?

Chemical Structures Quiz costs $3.99, with no in-app purchases.

### Is iGyn U free?

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

### Do Chemical Structures Quiz or iGyn U have ads?

Neither Chemical Structures Quiz nor iGyn U shows ads.

### Which is updated more often, Chemical Structures Quiz or iGyn U?

Chemical Structures Quiz ships an update every 2 months, and iGyn U fortnightly. Most recently, Chemical Structures Quiz was updated on October 2, 2026 and iGyn U on October 26, 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.*