# 문제툭 vs retention+

The clearest difference is ads: retention+ at none against 문제툭's shown. retention+ also leads on update cadence (every 4 days vs fortnightly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. 문제툭 sells 5 in-app purchases, starting at $3.99 per month and retention+ sells 10 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

문제툭 ships an update fortnightly, retention+ every 4 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | 문제툭 | retention+ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 73.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 137 MB | 23 MB |
| Requires iOS | 18.0 | **17.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [YEONGJIN AHN](https://appshunter.io/developer/1809098502) | [WONYEONG NA](https://appshunter.io/developer/6783655961) |

## What reviewers say

### 문제툭

[App page](https://appshunter.io/ios/app/id6744727210)

This app uses AI to automatically generate practice questions from your study materials. Easily create and solve custom quizzes, including multiple-choice, fill-in-the-blank, and true/false formats, to reinforce learning and identify areas for improvement.

**Highlights:** AI-generated questions from PDFs, Multiple-choice quiz creation, Fill-in-the-blank quiz creation, True/False quiz creation, Mixed quiz modes, Study progress tracking, Quiz challenges and credits, Character chat feature

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 문제툭 Basic 구독 | $3.99 | per month |
| 문제툭 Pro 구독 | $5.99 | per month |
| 문제툭 Premier 구독 | $10.99 | per month |
| 문제툭 Pro 연 구독 | $53.99 | per year |
| 문제툭 Premier 연 구독 | $99.99 | per year |


### retention+

[App page](https://appshunter.io/ios/app/retention-plus/id6783655959)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| retention+ 월간 구독 | $0.99 | per month |
| retention+ 연간 구독 | $9.99 | per year |
| Developer Support I | $0.49 | one-time |
| Developer Support II | $1.99 | one-time |
| Developer Support III | $2.99 | one-time |
| Developer Support IV | $5.99 | one-time |
| Developer Support V | $9.99 | one-time |
| Developer Support VI | $17.99 | one-time |
| Developer Support VII | $34.99 | one-time |
| Developer Support VIII | $69.99 | one-time |


## Frequently asked questions

### Is 문제툭 free?

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

### Is retention+ free?

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

### Do 문제툭 or retention+ have ads?

문제툭 shows ads; retention+ does not.

### Which is updated more often, 문제툭 or retention+?

문제툭 ships an update fortnightly, and retention+ every 4 days. Most recently, 문제툭 was updated on October 25, 2026 and retention+ on October 25, 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.*