# IPST Catalog vs SE

The clearest difference is update cadence: SE at every 3 weeks against IPST Catalog's every 6 months. IPST Catalog's advantage is iOS requirement (9.0 vs 15.0). 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.

IPST Catalog ships an update every 6 months, SE every 3 weeks. The most recent releases landed on May 16, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | IPST Catalog | SE |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 75 MB | 157 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Institute for the Promotion of Teaching Science and Technology (IPST)](https://appshunter.io/developer/643591471) | [SE-EDUCATION PCL](https://appshunter.io/developer/493497615) |

## What reviewers say

### IPST Catalog

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

**Features:** macOS Compatibility

**In-app purchases:** none


### SE

[App page](https://appshunter.io/ios/app/se-ed-reader/id6468010873)

A digital bookstore and content hub designed for avid readers. Enjoy a comfortable reading experience with customizable page-turning options, accessible anytime, anywhere, even offline. Discover a curated collection of valuable content.

**Highlights:** Digital bookstore and content hub, Offline reading capability, Customizable reading modes, Variety of page-turning options, Comfortable reading experience

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

**In-app purchases:** none


## Frequently asked questions

### Is IPST Catalog free?

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

### Is SE free?

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

### Do IPST Catalog or SE have ads?

Neither IPST Catalog nor SE shows ads.

### Which is updated more often, IPST Catalog or SE?

IPST Catalog ships an update every 6 months, and SE every 3 weeks. Most recently, IPST Catalog was updated on May 16, 2026 and SE on September 17, 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.*