# PDB Viewer vs MolViewApp

The clearest difference is in-app purchases: MolViewApp at none against PDB Viewer's 1. MolViewApp also leads on update cadence (every 2 days vs every 3 weeks). 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. MolViewApp asks for nothing beyond the download.

PDB Viewer ships an update every 3 weeks, MolViewApp every 2 days. The most recent releases landed on September 10, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | PDB Viewer | MolViewApp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/molviewapp/id6786979305/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Monetization | — | Free |
| Size | 2 MB | 29 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | +4 | 4+ |
| Developer | [Qvyshift LLC](https://appshunter.io/developer/1536442361) | [Donghan Lee](https://appshunter.io/developer/1820113725) |

## What reviewers say

### 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 |


### MolViewApp

[App page](https://appshunter.io/ios/app/molviewapp/id6786979305)

Explore 3D molecular structures with interactive visualizations. Load PDB files locally or by ID and utilize various display modes and advanced features like electrostatic potential mapping and structural alignment. All processing is done on-device for privacy.

**Highlights:** Load PDB files locally or by ID, Multiple structure loading and visibility control, Surface electrostatic potential map, Structural alignment and superposition, Secondary structure coloring, Morphing between conformations

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

**In-app purchases:** none


## Frequently asked questions

### Is PDB Viewer free?

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

### Is MolViewApp free?

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

### Do PDB Viewer or MolViewApp have ads?

Neither PDB Viewer nor MolViewApp shows ads.

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

PDB Viewer ships an update every 3 weeks, and MolViewApp every 2 days. Most recently, PDB Viewer was updated on September 10, 2026 and MolViewApp on September 25, 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.*