# IPST Catalog vs Readeve

The clearest difference is in-app purchases: IPST Catalog at none against Readeve's 7. IPST Catalog also leads on iOS requirement (9.0 vs 15.0). Readeve's advantage is update cadence (every 3 days vs every 6 months). On price, ads and device support there is nothing between them.

Both are free to download. Readeve sells 7 one-off in-app purchases. IPST Catalog asks for nothing beyond the download.

IPST Catalog ships an update every 6 months, Readeve every 3 days. The most recent releases landed on November 6, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | IPST Catalog | Readeve |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 days** |
| Size | 75 MB | 88 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| 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


### Readeve

[App page](https://appshunter.io/ios/app/readeve/id6748056651)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 50 เหรียญ (เริ่มต้น) | $1.99 | one-time |
| 100 เหรียญ (แนะนำ) | $2.99 | one-time |
| 150 เหรียญ (คุ้มค่า) | $4.99 | one-time |
| 200 เหรียญ (สุดคุ้ม) | $4.99 | one-time |
| 300 เหรียญ (แพ็กยอดนิยม) | $9.99 | one-time |
| 500 เหรียญ (สายเปย์) | $17.99 | one-time |
| 800 เหรียญ (แพ็กใหญ่) | $29.99 | one-time |


## Frequently asked questions

### Is IPST Catalog free?

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

### Is Readeve free?

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

### Do IPST Catalog or Readeve have ads?

Neither IPST Catalog nor Readeve shows ads.

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

IPST Catalog ships an update every 6 months, and Readeve every 3 days. Most recently, IPST Catalog was updated on November 6, 2026 and Readeve on November 8, 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.*