# 오답노트 vs StudyStamp

The clearest difference is update cadence: StudyStamp at every 4 days against 오답노트's every 3 weeks. 오답노트's advantage is device support (3 vs 1) and iOS requirement (15.5 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.

오답노트 ships an update every 3 weeks, StudyStamp every 4 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 오답노트 | StudyStamp |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Size | 119 MB | 8 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Huiyoung Yun](https://appshunter.io/developer/1895789908) | [YoungBeom Seo](https://appshunter.io/developer/6807436974) |

## What reviewers say

### 오답노트

[App page](https://appshunter.io/ios/app/id6775327965)

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

**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 오답노트 free?

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

### Is StudyStamp free?

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

### Do 오답노트 or StudyStamp have ads?

Neither 오답노트 nor StudyStamp shows ads.

### Which is updated more often, 오답노트 or StudyStamp?

오답노트 ships an update every 3 weeks, and StudyStamp every 4 days. Most recently, 오답노트 was updated on October 25, 2026 and StudyStamp on October 24, 2026.

---

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