# ecofactory vs kookminbooks

The clearest difference is update cadence: kookminbooks at every 3 weeks against ecofactory's every 3 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.

ecofactory ships an update every 3 months, kookminbooks every 3 weeks. The most recent releases landed on September 11, 2026 and May 19, 2026 respectively.

## The numbers

| Metric | ecofactory | kookminbooks |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 70 MB | 73 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Culture of Beauty co.ltd](https://appshunter.io/developer/1858172464) | [국민서관 (주)](https://appshunter.io/developer/1838636212) |

## What reviewers say

### ecofactory

[App page](https://appshunter.io/ios/app/ecofactory/id1497823708)

**In-app purchases:** none


### kookminbooks

[App page](https://appshunter.io/ios/app/kookminbooks/id6752280588)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ecofactory free?

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

### Is kookminbooks free?

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

### Do ecofactory or kookminbooks have ads?

Both ecofactory and kookminbooks show ads.

### Which is updated more often, ecofactory or kookminbooks?

ecofactory ships an update every 3 months, and kookminbooks every 3 weeks. Most recently, ecofactory was updated on September 11, 2026 and kookminbooks on May 19, 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.*