# Molecule World vs BioViewer

The clearest difference is review sentiment: Molecule World at 100% against BioViewer's 33%. Molecule World also leads on rating (5.0 vs 1.0) and ratings volume (4 vs 1). BioViewer's advantage is monetization model (free vs paid) and update cadence (every 9 days vs every 2 months). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Molecule World holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews point the same way: 100% of Molecule World's written reviews are positive against 33% of BioViewer's.

Molecule World ships an update every 2 months, BioViewer every 9 days. The most recent releases landed on October 7, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Molecule World | BioViewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/molecule-world/id863565223/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/bioviewer/id1593006498/reviews) |
| Number of ratings | **4** | 1 |
| Positive reviews | **100.0% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Paid | **Free** |
| Size | 15 MB | 9 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Digital World Biology LLC](https://appshunter.io/developer/863565226) | [Raul Monton Pinillos](https://appshunter.io/developer/1576884003) |

## What reviewers say

### Molecule World

[App page](https://appshunter.io/ios/app/molecule-world/id863565223)

Explore interactive 3D models of molecules, proteins, and DNA. This educational tool allows users to manipulate structures, experiment with visualization styles, and learn about chemical properties. Ideal for students and science enthusiasts of all ages.

**Highlights:** Interactive 3D molecule manipulation, Experiment with drawing and coloring styles, View and control molecular sequences (protein, DNA, RNA), Identify elements and investigate molecular properties, Capture images of molecular structures, Explore themed collections of molecules

**Features:** Family Sharing

**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 Molecule World free?

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

### Is BioViewer free?

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

### Which has better reviews, Molecule World or BioViewer?

Molecule World is rated higher. Molecule World averages 5.0 out of 5 from 4 ratings, while BioViewer averages 1.0 from 1 ratings.

### Do Molecule World or BioViewer have ads?

Neither Molecule World nor BioViewer shows ads.

### Which is updated more often, Molecule World or BioViewer?

Molecule World ships an update every 2 months, and BioViewer every 9 days. Most recently, Molecule World was updated on October 7, 2026 and BioViewer on October 14, 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.*