# CellWalk vs PDB Viewer

The clearest difference is device support: CellWalk at 4 against PDB Viewer's 2. PDB Viewer's advantage is iOS requirement (16.0 vs 27.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. CellWalk sells 3 in-app purchases, starting at $9.99 per month and PDB Viewer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

CellWalk ships an update every 3 weeks, PDB Viewer monthly. The most recent releases landed on October 17, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | CellWalk | PDB Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (71 ratings)](https://appshunter.io/ios/app/cellwalk/id1627776848/reviews)** | — |
| Number of ratings | **71** | — |
| Positive reviews | 91.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 552 MB | 2 MB |
| Requires iOS | 27.0 | **16.0** |
| Devices | **iPhone, iPad, Mac, Vision Pro** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Ako Biotica Inc.](https://appshunter.io/developer/1895703608) | [Qvyshift LLC](https://appshunter.io/developer/1536442361) |

## What reviewers say

### CellWalk

[App page](https://appshunter.io/ios/app/cellwalk/id1627776848)

Explore the intricate world of cells in a 3D environment, from the overall structure down to molecular details. Tap on terms to receive clear, contextual explanations powered by on-device AI, adapting to your learning level. Designed for students and educators to foster a deeper understanding of cell biology.

**Highlights:** 3D cell exploration, On-device AI definitions, Multi-level explanations, Interactive concept chains, Touch-first navigation, High-fidelity visuals

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CellWalk Pro Monthly | $9.99 | per month |
| CellWalk Pro Annual | $79.99 | per year |
| Pro Lessons | $29.99 | one-time |

**What reviewers like**

- ✨ Stunning visualizations
- 🔬 Incredible detail
- 🧠 Informative content
- 👍 Easy to use
- 🚀 Smooth performance

**What reviewers complain about**

- ⚠️ Misleading information
- 📚 Limited content
- 🖼️ Tiny window view
- 😵 Nauseating renderer
- 🐛 Buggy performance

**Reported bugs**

- ATP synthase described backwards
- Renderer noise causes nausea
- Buggy and low framerate
- Renderer not responsive to head movements

**Requested features**

- More cells to explore (eukaryotic, mammalian, computer cells)
- More content and depth
- Expand on descriptions with an 'expand on' feature
- Add tutorials for new users
- Add color to highlighted text for easy reference


### 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 CellWalk free?

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

### Is PDB Viewer free?

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

### Do CellWalk or PDB Viewer have ads?

Neither CellWalk nor PDB Viewer shows ads.

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

CellWalk ships an update every 3 weeks, and PDB Viewer monthly. Most recently, CellWalk was updated on October 17, 2026 and PDB Viewer on October 16, 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.*