# Chemical Structures Quiz vs Guess The Note

The clearest difference is price: Guess The Note at Free against Chemical Structures Quiz's $3.99. Guess The Note also leads on update cadence (every 3 weeks vs every 2 months). Chemical Structures Quiz's advantage is in-app purchases (none vs 1) and iOS requirement (11.0 vs 16.0). On ads and device support there is nothing between them.

Guess The Note is free to download; Chemical Structures Quiz costs $3.99 up front. Guess The Note sells 1 one-off in-app purchase. Chemical Structures Quiz asks for nothing beyond the download.

Chemical Structures Quiz ships an update every 2 months, Guess The Note every 3 weeks. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Chemical Structures Quiz | Guess The Note |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Paid | — |
| Size | 12 MB | 7 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Marijn Dillen](https://appshunter.io/developer/1276712320) | [YAHYA RASHWAN](https://appshunter.io/developer/6790022943) |

## 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


### Guess The Note

[App page](https://appshunter.io/ios/app/guess-the-note-ear-training/id6790022939)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Guess The Note Unlimited | $4.99 | one-time |


## Frequently asked questions

### Is Chemical Structures Quiz free?

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

### Is Guess The Note free?

Guess The Note is free to download, with in-app purchases available.

### Do Chemical Structures Quiz or Guess The Note have ads?

Neither Chemical Structures Quiz nor Guess The Note shows ads.

### Which is updated more often, Chemical Structures Quiz or Guess The Note?

Chemical Structures Quiz ships an update every 2 months, and Guess The Note every 3 weeks. Most recently, Chemical Structures Quiz was updated on November 8, 2026 and Guess The Note on October 31, 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.*