# IPST Catalog vs MOC Library

The clearest difference is iOS requirement: IPST Catalog at 9.0 against MOC Library's 12.1. On price, update cadence, ads and in-app purchases there is nothing between them.

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

IPST Catalog ships an update every 6 months, MOC Library every 4 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | IPST Catalog | MOC Library |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 months** |
| Size | 75 MB | 13 MB |
| Requires iOS | **9.0** | 12.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [The Institute for the Promotion of Teaching Science and Technology (IPST)](https://appshunter.io/developer/643591471) | [Ministry of Commerce](https://appshunter.io/developer/1045838122) |

## What reviewers say

### IPST Catalog

[App page](https://appshunter.io/ios/app/ipst-catalog/id772847993)

**Features:** macOS Compatibility

**In-app purchases:** none


### MOC Library

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IPST Catalog free?

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

### Is MOC Library free?

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

### Do IPST Catalog or MOC Library have ads?

Neither IPST Catalog nor MOC Library shows ads.

### Which is updated more often, IPST Catalog or MOC Library?

IPST Catalog ships an update every 6 months, and MOC Library every 4 months. Most recently, IPST Catalog was updated on November 1, 2026 and MOC Library on November 3, 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.*