# PDB Viewer vs XRM 2026

The clearest difference is in-app purchases: XRM 2026 at none against PDB Viewer's 1. XRM 2026 also leads on update cadence (daily vs monthly). 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. XRM 2026 asks for nothing beyond the download.

PDB Viewer ships an update monthly, XRM 2026 daily. The most recent releases landed on October 16, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | PDB Viewer | XRM 2026 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Daily** |
| Size | 2 MB | 35 MB |
| Requires iOS | 16.0 | **15.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Qvyshift LLC](https://appshunter.io/developer/1536442361) | [Aptor Consultoria e Desenvolvimento de Software LTDA](https://appshunter.io/developer/704592899) |

## 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 |


### XRM 2026

[App page](https://appshunter.io/ios/app/xrm-2026/id6793676481)

**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 XRM 2026 free?

XRM 2026 is free to download, with no in-app purchases.

### Do PDB Viewer or XRM 2026 have ads?

Neither PDB Viewer nor XRM 2026 shows ads.

### Which is updated more often, PDB Viewer or XRM 2026?

PDB Viewer ships an update monthly, and XRM 2026 daily. Most recently, PDB Viewer was updated on October 16, 2026 and XRM 2026 on October 10, 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.*