# iMolview vs BioViewer

The clearest difference is price: BioViewer at Free against iMolview's $0.99. BioViewer also leads on update cadence (every 9 days vs every 2 months). iMolview's advantage is review sentiment (78% vs 33%) and rating (3.6 vs 1.0). On ads, in-app purchases, monetization model and device support there is nothing between them.

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

iMolview holds the better App Store score, 3.6 against 1.0. That said, the two scores are not equally well evidenced: iMolview has 13 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 78% of iMolview's written reviews are positive against 33% of BioViewer's.

iMolview ships an update every 2 months, BioViewer every 9 days. The most recent releases landed on September 22, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | iMolview | BioViewer |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[3.6 (13 ratings)](https://appshunter.io/ios/app/imolview/id431002306/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/bioviewer/id1593006498/reviews) |
| Number of ratings | **13** | 1 |
| Positive reviews | **78.1% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Free | Free |
| Size | 55 MB | 9 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Molsoft](https://appshunter.io/developer/431002309) | [Raul Monton Pinillos](https://appshunter.io/developer/1576884003) |

## 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


### BioViewer

[App page](https://appshunter.io/ios/app/bioviewer/id1593006498)

Visualize 3D molecular structures from .pdb files on iOS, iPadOS, and macOS. Features smooth rendering, drag-and-drop support, and publication-quality photo exports for detailed analysis.

**Highlights:** 3D molecular structure visualization, Supports .pdb and .xyz files, Drag and drop functionality, Photo Mode with high-quality exports, Multi-model PDB support, Optimized for ProMotion displays

**In-app purchases:** none


## Frequently asked questions

### Is iMolview free?

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

### Is BioViewer free?

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

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

iMolview is rated higher. iMolview averages 3.6 out of 5 from 13 ratings, while BioViewer averages 1.0 from 1 ratings.

### Do iMolview or BioViewer have ads?

Neither iMolview nor BioViewer shows ads.

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

iMolview ships an update every 2 months, and BioViewer every 9 days. Most recently, iMolview was updated on September 22, 2026 and BioViewer on September 10, 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.*