# BioViewer vs PDB Viewer

The clearest difference is in-app purchases: BioViewer at none against PDB Viewer's 1. BioViewer also leads on update cadence (every 9 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PDB Viewer sells 1 one-off in-app purchase. BioViewer asks for nothing beyond the download.

BioViewer ships an update every 9 days, PDB Viewer monthly. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | BioViewer | PDB Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/bioviewer/id1593006498/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Monthly |
| Monetization | Free | — |
| Size | 9 MB | 2 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Raul Monton Pinillos](https://appshunter.io/developer/1576884003) | [Qvyshift LLC](https://appshunter.io/developer/1536442361) |

## What reviewers say

### 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


### PDB Viewer

[App page](https://appshunter.io/ios/app/pdb-viewer-3d-molecules/id6777468488)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDB Viewer Pro | $9.99 | one-time |


## Frequently asked questions

### Is BioViewer free?

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

### Is PDB Viewer free?

PDB Viewer is free to download, with in-app purchases available.

### Do BioViewer or PDB Viewer have ads?

Neither BioViewer nor PDB Viewer shows ads.

### Which is updated more often, BioViewer or PDB Viewer?

BioViewer ships an update every 9 days, and PDB Viewer monthly. Most recently, BioViewer was updated on November 3, 2026 and PDB Viewer on October 28, 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.*