# Charles Darwin vs BioViewer

The clearest difference is price: BioViewer at Free against Charles Darwin's $1.99. BioViewer also leads on review sentiment (33% vs 0%) and update cadence (every 9 days vs every 6 months). Charles Darwin's advantage is iOS requirement (15.6 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

BioViewer is free to download; Charles Darwin costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Charles Darwin ships an update every 6 months, BioViewer every 9 days. Both last shipped on September 10, 2026.

## The numbers

| Metric | Charles Darwin | BioViewer |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/bioviewer/id1593006498/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | **33.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 9 days** |
| Monetization | Paid | **Free** |
| Size | 44 MB | 9 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPad, Mac, Apple TV | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [Raul Monton Pinillos](https://appshunter.io/developer/1576884003) |

## What reviewers say

### Charles Darwin

[App page](https://appshunter.io/ios/app/charles-darwin-evolution/id1425175548)

Embark on Charles Darwin's historic voyage aboard the HMS Beagle. Explore maps, diagrams, and text detailing his discoveries and the science of evolution. Test your knowledge with an included quiz.

**Highlights:** Trace HMS Beagle's voyage, Learn about Darwin's discoveries, Explore maps and diagrams, Study the science of evolution, Test knowledge with a quiz

**Features:** 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 Charles Darwin free?

Charles Darwin costs $1.99, with no in-app purchases.

### Is BioViewer free?

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

### Do Charles Darwin or BioViewer have ads?

Neither Charles Darwin nor BioViewer shows ads.

### Which is updated more often, Charles Darwin or BioViewer?

Charles Darwin ships an update every 6 months, and BioViewer every 9 days. Most recently, Charles Darwin was updated on September 10, 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.*