# ProblemShorts vs 문득

The clearest difference is ads: 문득 at none against ProblemShorts's shown. 문득 also leads on update cadence (every 3 days vs every 2 weeks). ProblemShorts's advantage is iOS requirement (15.0 vs 17.2). On price, in-app purchases and device support there is nothing between them.

Both are free to download. ProblemShorts sells 1 in-app purchase, starting at $6.99 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.

ProblemShorts ships an update every 2 weeks, 문득 every 3 days. The most recent releases landed on November 8, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | ProblemShorts | 문득 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 55.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Monetization | — | Freemium |
| Size | 43 MB | 66 MB |
| Requires iOS | **15.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [AKA SOFT](https://appshunter.io/developer/1826018040) | [JIHWAN YEOM](https://appshunter.io/developer/6805761199) |

## What reviewers say

### ProblemShorts

[App page](https://appshunter.io/ios/app/problemshorts/id6743131508)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 베이직 30일 구독 | $6.99 | per month |


### 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 for effortless review, helping you learn without dedicated study time. Track your progress and get personalized quizzes to reinforce weak areas.

**Highlights:** AI quiz generation from PDFs, PPTX, photos, and Notion, Lock screen quiz display for passive learning, Automatic question and answer creation, Learning reports to identify weak concepts, Personalized quiz generation 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 ProblemShorts free?

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

### Is 문득 free?

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

### Do ProblemShorts or 문득 have ads?

ProblemShorts shows ads; 문득 does not.

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

ProblemShorts ships an update every 2 weeks, and 문득 every 3 days. Most recently, ProblemShorts was updated on November 8, 2026 and 문득 on November 12, 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.*