# MOC Library vs Skybook E

The clearest difference is update cadence: MOC Library at every 4 months against Skybook E's every 30 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

MOC Library ships an update every 4 months, Skybook E every 30 months. The most recent releases landed on September 16, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | MOC Library | Skybook E |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 30 months |
| Size | 13 MB | 12 MB |
| Requires iOS | 12.1 | 12.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Ministry of Commerce](https://appshunter.io/developer/1045838122) | [STAQ Technologies Co., Ltd.](https://appshunter.io/developer/506659247) |

## What reviewers say

### MOC Library

[App page](https://appshunter.io/ios/app/moc-library/id1470377629)

**Features:** macOS Compatibility

**In-app purchases:** none


### Skybook E

[App page](https://appshunter.io/ios/app/skybook-e-library/id1599065699)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MOC Library free?

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

### Is Skybook E free?

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

### Do MOC Library or Skybook E have ads?

Neither MOC Library nor Skybook E shows ads.

### Which is updated more often, MOC Library or Skybook E?

MOC Library ships an update every 4 months, and Skybook E every 30 months. Most recently, MOC Library was updated on September 16, 2026 and Skybook E on September 30, 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.*