# iMolview vs Chem Viewer

The clearest difference is price: Chem Viewer at Free against iMolview's $0.99. Chem Viewer also leads on update cadence (every 4 days vs every 2 months) and rating (4.0 vs 3.6). iMolview's advantage is ads (none vs shown) and review sentiment (79% vs 67%). On in-app purchases, device support and iOS requirement there is nothing between them.

Chem Viewer is free to download; iMolview costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Chem Viewer holds the better App Store score, 4.0 against 3.6. Both are backed by a comparable volume of ratings — 13 and 4 respectively. Written reviews complicate that: 79% of iMolview's written reviews are positive against 67% of Chem Viewer's, so the app with the better star average is not the one people write more warmly about.

iMolview ships an update every 2 months, Chem Viewer every 4 days. The most recent releases landed on October 18, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | iMolview | Chem Viewer |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.6 (13 ratings)](https://appshunter.io/ios/app/imolview/id431002306/reviews) | **[4.0 (4 ratings)](https://appshunter.io/ios/app/chem-viewer/id1571068897/reviews)** |
| Number of ratings | **13** | 4 |
| Positive reviews | **78.9% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | **Free** | Ad-supported |
| Size | 55 MB | 40 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Molsoft](https://appshunter.io/developer/431002309) | [Dylan Riffle](https://appshunter.io/developer/1142744409) |

## 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


### Chem Viewer

[App page](https://appshunter.io/ios/app/chem-viewer/id1571068897)

Visualize chemical compounds in 2D and 3D with this app. Access over 3 million compounds from the PubChem database and interact with 3D models using touch gestures. Ideal for students, researchers, and educators.

**Highlights:** 2D and 3D chemical views, Access to 3+ million compounds, PubChem database integration, Interactive 3D model manipulation, Suitable for students and researchers

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iMolview free?

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

### Is Chem Viewer free?

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

### Which has better reviews, iMolview or Chem Viewer?

Chem Viewer is rated higher. iMolview averages 3.6 out of 5 from 13 ratings, while Chem Viewer averages 4.0 from 4 ratings.

### Do iMolview or Chem Viewer have ads?

Chem Viewer shows ads; iMolview does not.

### Which is updated more often, iMolview or Chem Viewer?

iMolview ships an update every 2 months, and Chem Viewer every 4 days. Most recently, iMolview was updated on October 18, 2026 and Chem Viewer on October 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*