# Organic Nomenclature vs ReactionFlash

The clearest difference is in-app purchases: ReactionFlash at none against Organic Nomenclature's 2. ReactionFlash also leads on update cadence (every 4 months vs every 21 months). Organic Nomenclature's advantage is ratings volume (661 vs 42) and iOS requirement (11.0 vs 14.0). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Organic Nomenclature sells 2 one-off in-app purchases. ReactionFlash asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Organic Nomenclature against 4.8 for ReactionFlash. That said, the two scores are not equally well evidenced: Organic Nomenclature has 661 ratings behind it against 42, so its average is the more settled of the two. Written reviews are what separate them: 87% of Organic Nomenclature's written reviews are positive against 81% of ReactionFlash's.

Organic Nomenclature ships an update every 21 months, ReactionFlash every 4 months. The most recent releases landed on November 7, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Organic Nomenclature | ReactionFlash |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (661 ratings)](https://appshunter.io/ios/app/organic-nomenclature/id414464969/reviews) | **[4.8 (42 ratings)](https://appshunter.io/ios/app/reactionflash/id432080813/reviews)** |
| Number of ratings | **661** | 42 |
| Positive reviews | **87.3% of reviews** | 80.6% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 4 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 24 MB | 37 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aaron M. Hartel](https://appshunter.io/developer/408475765) | [Elsevier Limited](https://appshunter.io/developer/1437273934) |

## What reviewers say

### Organic Nomenclature

[App page](https://appshunter.io/ios/app/organic-nomenclature/id414464969)

Master chemical nomenclature with interactive lessons and quizzes covering various organic compound classes. Practice naming compounds and receive intelligent feedback to improve comprehension. View compounds in skeletal or condensed form.

**Highlights:** Interactive naming lessons, Practice quizzes, Intelligent quiz grading, Skeletal and condensed compound views, Alkanes, alcohols, aromatics naming

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Nomenclature 1 | $1.99 | one-time |
| Nomenclature 2 | $1.99 | one-time |

**What reviewers like**

- 👍 Good practice
- 👍 Clearly explains naming
- 👍 Easy to use
- 👍 Fun and quick learning
- 👍 Helpful for studying

**What reviewers complain about**

- 🐛 Limited functional groups
- 🐛 No support for isomers
- 🐛 Short quizzes
- 🐛 Lack of explanations for errors
- 🐛 Naming not fully IUPAC compliant

**Reported bugs**

- Buttons not working
- Frequent crashes

**Requested features**

- More practice questions and quizzes
- Explanations for incorrect answers
- Support for advanced naming (isomers, stereochemistry)
- Expanded set of functional groups
- Ability to track progress and performance


### ReactionFlash

[App page](https://appshunter.io/ios/app/reactionflash/id432080813)

This app serves as a comprehensive flashcard-style learning tool for named chemical reactions. It provides detailed information on reaction mechanisms and examples from scientific literature, with a quiz mode to test user knowledge.

**Highlights:** Learn named chemical reactions, Understand reaction mechanisms, View literature examples, Quiz mode for knowledge testing, Flashcard interface

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Organic Nomenclature free?

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

### Is ReactionFlash free?

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

### Which has better reviews, Organic Nomenclature or ReactionFlash?

ReactionFlash is rated higher. Organic Nomenclature averages 4.7 out of 5 from 661 ratings, while ReactionFlash averages 4.8 from 42 ratings.

### Do Organic Nomenclature or ReactionFlash have ads?

Neither Organic Nomenclature nor ReactionFlash shows ads.

### Which is updated more often, Organic Nomenclature or ReactionFlash?

Organic Nomenclature ships an update every 21 months, and ReactionFlash every 4 months. Most recently, Organic Nomenclature was updated on November 7, 2026 and ReactionFlash on November 1, 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.*