# 똑똑 과학단추 vs StudyStamp

The clearest difference is update cadence: StudyStamp at every 3 days against 똑똑 과학단추's every 5 months. 똑똑 과학단추's advantage is device support (3 vs 1) and iOS requirement (9.0 vs 17.0). On price, 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.

똑똑 과학단추 ships an update every 5 months, StudyStamp every 3 days. The most recent releases landed on October 1, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | 똑똑 과학단추 | StudyStamp |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 days** |
| Size | 1.5 GB | 8 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [KYOWON CO.,LTD](https://appshunter.io/developer/402661067) | [YoungBeom Seo](https://appshunter.io/developer/6807436974) |

## What reviewers say

### 똑똑 과학단추

[App page](https://appshunter.io/ios/app/id1449124248)

**Features:** macOS Compatibility

**In-app purchases:** none


### StudyStamp

[App page](https://appshunter.io/ios/app/studystamp/id6807436972)

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

**In-app purchases:** none


## Frequently asked questions

### Is 똑똑 과학단추 free?

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

### Is StudyStamp free?

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

### Do 똑똑 과학단추 or StudyStamp have ads?

Neither 똑똑 과학단추 nor StudyStamp shows ads.

### Which is updated more often, 똑똑 과학단추 or StudyStamp?

똑똑 과학단추 ships an update every 5 months, and StudyStamp every 3 days. Most recently, 똑똑 과학단추 was updated on October 1, 2026 and StudyStamp on October 2, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*