# ReactionFlash vs WebMO Premium

The clearest difference is price: ReactionFlash at Free against WebMO Premium's $4.99. ReactionFlash also leads on rating (4.8 vs 4.0) and update cadence (every 4 months vs every 17 months). WebMO Premium's advantage is iOS requirement (12.0 vs 14.0). On ads, in-app purchases and device support there is nothing between them.

ReactionFlash is free to download; WebMO Premium costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReactionFlash holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: ReactionFlash has 41 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 81% of ReactionFlash's written reviews are positive against 67% of WebMO Premium's.

ReactionFlash ships an update every 4 months, WebMO Premium every 17 months. The most recent releases landed on September 29, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | ReactionFlash | WebMO Premium |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[4.8 (41 ratings)](https://appshunter.io/ios/app/reactionflash/id432080813/reviews)** | [4.0 (4 ratings)](https://appshunter.io/ios/app/webmo-premium/id1448564335/reviews) |
| Number of ratings | **41** | 4 |
| Positive reviews | **80.6% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 17 months |
| Monetization | **Free** | Paid |
| 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 Premium

[App page](https://appshunter.io/ios/app/webmo-premium/id1448564335)

This app allows users to build and visualize molecules in 3D, access chemical information from external databases, and interact with advanced computational chemistry programs. It's designed for students and faculty needing mobile access to molecular structures and data.

**Highlights:** 3D molecular editor, VSEPR and molecular mechanics optimization, Orbital and symmetry visualization, Chemical data lookup, Computational chemistry program integration, Spectra visualization

**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 WebMO Premium free?

WebMO Premium costs $4.99, with no in-app purchases.

### Which has better reviews, ReactionFlash or WebMO Premium?

ReactionFlash is rated higher. ReactionFlash averages 4.8 out of 5 from 41 ratings, while WebMO Premium averages 4.0 from 4 ratings.

### Do ReactionFlash or WebMO Premium have ads?

Neither ReactionFlash nor WebMO Premium shows ads.

### Which is updated more often, ReactionFlash or WebMO Premium?

ReactionFlash ships an update every 4 months, and WebMO Premium every 17 months. Most recently, ReactionFlash was updated on September 29, 2026 and WebMO Premium on September 19, 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.*