# IPST Catalog vs EveEbook

The clearest difference is in-app purchases: IPST Catalog at none against EveEbook's 10. IPST Catalog also leads on iOS requirement (9.0 vs 15.0). EveEbook's advantage is update cadence (fortnightly vs every 6 months). On price, ads and device support there is nothing between them.

Both are free to download. EveEbook sells 10 one-off in-app purchases. IPST Catalog asks for nothing beyond the download.

IPST Catalog ships an update every 6 months, EveEbook fortnightly. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | IPST Catalog | EveEbook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Fortnightly** |
| Size | 75 MB | 86 MB |
| Requires iOS | **9.0** | 15.0 |
| 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) | [EVEBOOK COMPANY LIMITED](https://appshunter.io/developer/1816647293) |

## What reviewers say

### IPST Catalog

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

**Features:** macOS Compatibility

**In-app purchases:** none


### EveEbook

[App page](https://appshunter.io/ios/app/eveebook/id6746397169)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 50 เหรียญ | $1.99 | one-time |
| 150 เหรียญ | $5.99 | one-time |
| 200 เหรียญ | $7.99 | one-time |
| 300 เหรียญ | $11.99 | one-time |
| 400 เหรียญ | $14.99 | one-time |
| 500 เหรียญ | $19.99 | one-time |
| 700 เหรียญ | $19.99 | one-time |
| 900 เหรียญ | $24.99 | one-time |
| 800 เหรียญ | $29.99 | one-time |
| 1000 เหรียญ | $39.99 | one-time |


## Frequently asked questions

### Is IPST Catalog free?

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

### Is EveEbook free?

EveEbook is free to download, with in-app purchases available.

### Do IPST Catalog or EveEbook have ads?

Neither IPST Catalog nor EveEbook shows ads.

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

IPST Catalog ships an update every 6 months, and EveEbook fortnightly. Most recently, IPST Catalog was updated on November 1, 2026 and EveEbook on November 5, 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.*