# ReactionFlash vs iChemistry™

The clearest difference is rating: ReactionFlash at 4.8 against iChemistry™'s 3.6. ReactionFlash also leads on monetization model (free vs freemium) and review sentiment (81% vs 66%). iChemistry™'s advantage is iOS requirement (9.0 vs 14.0). On price, ratings volume, update cadence and ads there is nothing between them.

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

ReactionFlash holds the better App Store score, 4.8 against 3.6. Both are backed by a comparable volume of ratings — 41 and 14 respectively. Written reviews point the same way: 81% of ReactionFlash's written reviews are positive against 66% of iChemistry™'s.

ReactionFlash ships an update every 4 months, iChemistry™ every 5 months. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | ReactionFlash | iChemistry™ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (41 ratings)](https://appshunter.io/ios/app/reactionflash/id432080813/reviews)** | [3.6 (14 ratings)](https://appshunter.io/ios/app/ichemistry/id927336536/reviews) |
| Number of ratings | **41** | 14 |
| Positive reviews | **80.6% of reviews** | 66.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 5 months |
| Monetization | **Free** | Freemium |
| Size | 37 MB | 104 MB |
| Requires iOS | 14.0 | **9.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [Elsevier Limited](https://appshunter.io/developer/1437273934) | [Antonio Giarrusso](https://appshunter.io/developer/1433879699) |

## What reviewers say

### 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


### iChemistry™

[App page](https://appshunter.io/ios/app/ichemistry/id927336536)

This app serves as a personal chemistry tutor, offering comprehensive learning materials for students. It covers over 70 topics with clear explanations and effective syntheses for easy review of formulas and laws. An advanced search helps locate specific subjects quickly.

**Highlights:** Over 70 chemistry topics, Clear and simple explanations, Effective synthesis for review, Advanced search algorithm, Interactive multiple choice quizzes, Step-by-step solved examples

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

**In-app purchases:** none


## Frequently asked questions

### Is ReactionFlash free?

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

### Is iChemistry™ free?

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

### Which has better reviews, ReactionFlash or iChemistry™?

ReactionFlash is rated higher. ReactionFlash averages 4.8 out of 5 from 41 ratings, while iChemistry™ averages 3.6 from 14 ratings.

### Do ReactionFlash or iChemistry™ have ads?

Neither ReactionFlash nor iChemistry™ shows ads.

### Which is updated more often, ReactionFlash or iChemistry™?

ReactionFlash ships an update every 4 months, and iChemistry™ every 5 months. Most recently, ReactionFlash was updated on October 7, 2026 and iChemistry™ on October 12, 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.*