# IRAKU vs PDB Viewer

The clearest difference is in-app purchases: IRAKU at none against PDB Viewer's 1. PDB Viewer's advantage is ads (none vs shown) and update cadence (monthly vs every 5 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. PDB Viewer sells 1 one-off in-app purchase. IRAKU asks for nothing beyond the download.

IRAKU ships an update every 5 months, PDB Viewer monthly. Both last shipped on October 28, 2026.

## The numbers

| Metric | IRAKU | PDB Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Monthly** |
| Size | 30 MB | 2 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Fuji Bit Inc.](https://appshunter.io/developer/1874205957) | [Qvyshift LLC](https://appshunter.io/developer/1536442361) |

## What reviewers say

### IRAKU

[App page](https://appshunter.io/ios/app/iraku-genetics/id6768634144)

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

**In-app purchases:** none


### 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 IRAKU free?

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

### Is PDB Viewer free?

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

### Do IRAKU or PDB Viewer have ads?

IRAKU shows ads; PDB Viewer does not.

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

IRAKU ships an update every 5 months, and PDB Viewer monthly. Most recently, IRAKU was updated on October 28, 2026 and PDB Viewer on October 28, 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.*