# Chemical Structures Quiz vs Structural Formulas Study

The clearest difference is price: Structural Formulas Study at Free against Chemical Structures Quiz's $3.99. Chemical Structures Quiz's advantage is iOS requirement (11.0 vs 18.4). On update cadence, ads, in-app purchases and device support there is nothing between them.

Structural Formulas Study 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, Structural Formulas Study every 5 weeks. The most recent releases landed on September 7, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Chemical Structures Quiz | Structural Formulas Study |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Paid | — |
| Size | 12 MB | 5 MB |
| Requires iOS | **11.0** | 18.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Marijn Dillen](https://appshunter.io/developer/1276712320) | [Jun Yamabe](https://appshunter.io/developer/1732682049) |

## 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


### Structural Formulas Study

[App page](https://appshunter.io/ios/app/structural-formulas-study/id6752260162)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Chemical Structures Quiz free?

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

### Is Structural Formulas Study free?

Structural Formulas Study is free to download, with no in-app purchases.

### Do Chemical Structures Quiz or Structural Formulas Study have ads?

Neither Chemical Structures Quiz nor Structural Formulas Study shows ads.

### Which is updated more often, Chemical Structures Quiz or Structural Formulas Study?

Chemical Structures Quiz ships an update every 2 months, and Structural Formulas Study every 5 weeks. Most recently, Chemical Structures Quiz was updated on September 7, 2026 and Structural Formulas Study on September 20, 2026.

---

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