# ReactionFlash vs WebMO Molecule Editor

The clearest difference is rating: ReactionFlash at 4.8 against WebMO Molecule Editor's 4.0. ReactionFlash also leads on in-app purchases (none vs 2) and review sentiment (81% vs 60%). WebMO Molecule Editor's advantage is iOS requirement (12.0 vs 14.0). On price, ratings volume, update cadence and ads there is nothing between them.

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

ReactionFlash holds the better App Store score, 4.8 against 4.0. Both are backed by a comparable volume of ratings — 41 and 40 respectively. Written reviews point the same way: 81% of ReactionFlash's written reviews are positive against 60% of WebMO Molecule Editor's.

ReactionFlash ships an update every 4 months, WebMO Molecule Editor every 3 months. The most recent releases landed on September 21, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | ReactionFlash | WebMO Molecule Editor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (41 ratings)](https://appshunter.io/ios/app/reactionflash/id432080813/reviews)** | [4.0 (40 ratings)](https://appshunter.io/ios/app/webmo-molecule-editor/id797898095/reviews) |
| Number of ratings | **41** | 40 |
| Positive reviews | **80.6% of reviews** | 60.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 37 MB | 12 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Elsevier Limited](https://appshunter.io/developer/1437273934) | [WebMO, LLC](https://appshunter.io/developer/797898098) |

## 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


### WebMO Molecule Editor

[App page](https://appshunter.io/ios/app/webmo-molecule-editor/id797898095)

Create and explore 3D molecular structures, visualize chemical properties, and access extensive chemical databases. This tool is ideal for students and educators needing on-the-go access to molecular information and computational chemistry resources.

**Highlights:** 3D molecular editor, Structure optimization, Orbital and symmetry visualization, Chemical database lookup, Spectra visualization, High-resolution image capture, Computational chemistry program integration

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WebMO Premium for paid users | Free | one-time |
| WebMO Premium | $4.99 | one-time |


## Frequently asked questions

### Is ReactionFlash free?

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

### Is WebMO Molecule Editor free?

WebMO Molecule Editor is free to download, with in-app purchases available.

### Which has better reviews, ReactionFlash or WebMO Molecule Editor?

ReactionFlash is rated higher. ReactionFlash averages 4.8 out of 5 from 41 ratings, while WebMO Molecule Editor averages 4.0 from 40 ratings.

### Do ReactionFlash or WebMO Molecule Editor have ads?

Neither ReactionFlash nor WebMO Molecule Editor shows ads.

### Which is updated more often, ReactionFlash or WebMO Molecule Editor?

ReactionFlash ships an update every 4 months, and WebMO Molecule Editor every 3 months. Most recently, ReactionFlash was updated on September 21, 2026 and WebMO Molecule Editor on September 3, 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.*