# Gatekeeper Manager vs PDB Viewer

The clearest difference is in-app purchases: Gatekeeper Manager at none against PDB Viewer's 1. Gatekeeper Manager also leads on iOS requirement (14.0 vs 16.0). PDB Viewer's advantage is update cadence (every 3 weeks vs every 16 months). On price, ads and device support there is nothing between them.

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

Gatekeeper Manager ships an update every 16 months, PDB Viewer every 3 weeks. Both last shipped on September 10, 2026.

## The numbers

| Metric | Gatekeeper Manager | PDB Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 3 weeks** |
| Size | 23 MB | 2 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | +4 |
| Developer | [Robby Balona](https://appshunter.io/developer/989562931) | [Qvyshift LLC](https://appshunter.io/developer/1536442361) |

## What reviewers say

### Gatekeeper Manager

[App page](https://appshunter.io/ios/app/gatekeeper-manager/id6445949658)

**Features:** macOS Compatibility

**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 Gatekeeper Manager free?

Gatekeeper Manager 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 Gatekeeper Manager or PDB Viewer have ads?

Neither Gatekeeper Manager nor PDB Viewer shows ads.

### Which is updated more often, Gatekeeper Manager or PDB Viewer?

Gatekeeper Manager ships an update every 16 months, and PDB Viewer every 3 weeks. Most recently, Gatekeeper Manager was updated on September 10, 2026 and PDB Viewer on September 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.*