# WebMO Molecule Editor vs PDB Viewer

The clearest difference is update cadence: PDB Viewer at monthly against WebMO Molecule Editor's every 3 months. WebMO Molecule Editor's advantage is iOS requirement (12.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. WebMO Molecule Editor sells 2 one-off in-app purchases and PDB Viewer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

WebMO Molecule Editor ships an update every 3 months, PDB Viewer monthly. The most recent releases landed on October 7, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | WebMO Molecule Editor | PDB Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (40 ratings)](https://appshunter.io/ios/app/webmo-molecule-editor/id797898095/reviews)** | — |
| Number of ratings | **40** | — |
| Positive reviews | 60.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 12 MB | 2 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [WebMO, LLC](https://appshunter.io/developer/797898098) | [Qvyshift LLC](https://appshunter.io/developer/1536442361) |

## What reviewers say

### WebMO Molecule Editor

[App page](https://appshunter.io/ios/app/webmo-molecule-editor/id797898095)

Create and explore 3D molecular structures, visualize chemical properties, and access extensive chemical databases. This tool is ideal for students and educators needing on-the-go access to molecular information and computational chemistry resources.

**Highlights:** 3D molecular editor, Structure optimization, Orbital and symmetry visualization, Chemical database lookup, Spectra visualization, High-resolution image capture, Computational chemistry program integration

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WebMO Premium for paid users | Free | one-time |
| WebMO Premium | $4.99 | one-time |


### 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 WebMO Molecule Editor free?

WebMO Molecule Editor 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 WebMO Molecule Editor or PDB Viewer have ads?

Neither WebMO Molecule Editor nor PDB Viewer shows ads.

### Which is updated more often, WebMO Molecule Editor or PDB Viewer?

WebMO Molecule Editor ships an update every 3 months, and PDB Viewer monthly. Most recently, WebMO Molecule Editor was updated on October 7, 2026 and PDB Viewer on October 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*