# iMolview vs ReactionFlash

The clearest difference is price: ReactionFlash at Free against iMolview's $0.99. ReactionFlash also leads on rating (4.8 vs 3.6) and ratings volume (41 vs 13). iMolview's advantage is update cadence (every 2 months vs every 4 months) and iOS requirement (12.0 vs 14.0). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

ReactionFlash is free to download; iMolview costs $0.99 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 3.6. Both are backed by a comparable volume of ratings — 13 and 41 respectively. Written reviews point the same way: 78% of iMolview's written reviews are positive against 81% of ReactionFlash's.

iMolview ships an update every 2 months, ReactionFlash every 4 months. The most recent releases landed on September 22, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | iMolview | ReactionFlash |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.6 (13 ratings)](https://appshunter.io/ios/app/imolview/id431002306/reviews) | **[4.8 (41 ratings)](https://appshunter.io/ios/app/reactionflash/id432080813/reviews)** |
| Number of ratings | 13 | **41** |
| Positive reviews | 78.1% of reviews | **80.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free | Free |
| Size | 55 MB | 37 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Molsoft](https://appshunter.io/developer/431002309) | [Elsevier Limited](https://appshunter.io/developer/1437273934) |

## What reviewers say

### iMolview

[App page](https://appshunter.io/ios/app/imolview/id431002306)

Explore biological molecules in 3D. View proteins, DNA, and drug structures from major databases. Customize representations, select specific elements, and analyze molecular interactions. Sync your own files and save scenes for later.

**Highlights:** 3D molecular visualization, Browse PDB, DrugBank, Pubchem, Customizable representations, Individual element coloring, Neighbor analysis, Electron density map contouring, Scene saving and management

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

**In-app purchases:** none


### 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 iMolview free?

iMolview costs $0.99, with no in-app purchases.

### Is ReactionFlash free?

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

### Which has better reviews, iMolview or ReactionFlash?

ReactionFlash is rated higher. iMolview averages 3.6 out of 5 from 13 ratings, while ReactionFlash averages 4.8 from 41 ratings.

### Do iMolview or ReactionFlash have ads?

Neither iMolview nor ReactionFlash shows ads.

### Which is updated more often, iMolview or ReactionFlash?

iMolview ships an update every 2 months, and ReactionFlash every 4 months. Most recently, iMolview was updated on September 22, 2026 and ReactionFlash on September 21, 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.*