# 오답노트AI vs 문득

The clearest difference is review sentiment: 오답노트AI at 100% against 문득's 50%. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. 오답노트AI sells 2 in-app purchases, starting at $9.99 per month and 문득 sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

오답노트AI ships an update every 2 days, 문득 every 3 days. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | 오답노트AI | 문득 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 3 days |
| Monetization | Freemium | Freemium |
| Size | 33 MB | 66 MB |
| Requires iOS | 18.0 | **17.2** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [2Labs](https://appshunter.io/developer/1089573745) | [JIHWAN YEOM](https://appshunter.io/developer/6805761199) |

## What reviewers say

### 오답노트AI

[App page](https://appshunter.io/ios/app/ai-ai/id6787683753)

This app uses AI to automatically create personalized study notes and practice tests from your incorrect answers. Simply photograph your mistakes, and the AI will transcribe them, organize them by subject, and generate similar problems for further practice. It also offers an AI tutor for instant help and tracks your progress with weekly reports.

**Highlights:** AI-generated study notes from photos, Automatic organization by subject and unit, Personalized practice tests with similar problems, AI tutor for instant help with questions, Spaced repetition for review, Weekly progress reports, Printable PDF test creation

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 오답노트AI Pro 월간 | $9.99 | per month |
| 오답노트AI Pro 연간 | $79.99 | per year |


### 문득

[App page](https://appshunter.io/ios/app/ai-pdf/id6805761197)

This app generates AI-powered quizzes from your study materials like PDFs and Notion pages. It presents these quizzes on your lock screen, turning idle moments into study time. It also analyzes your weak areas and creates personalized quizzes for targeted review.

**Highlights:** AI quiz generation from PDFs, PPTX, photos, and Notion, Lock screen quiz display for passive learning, Learning reports to identify weak concepts, Customized quizzes for weak areas, No manual card creation required

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 문득 베이직 | $1.99 | per month |
| 문득 프리미엄 | $9.99 | per month |
| 크레딧 10개 | $1.99 | one-time |


## Frequently asked questions

### Is 오답노트AI free?

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

### Is 문득 free?

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

### Do 오답노트AI or 문득 have ads?

Neither 오답노트AI nor 문득 shows ads.

### Which is updated more often, 오답노트AI or 문득?

오답노트AI ships an update every 2 days, and 문득 every 3 days. Most recently, 오답노트AI was updated on November 5, 2026 and 문득 on November 6, 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.*