# 데이프렙 vs 코드서재

The clearest difference is ads: 코드서재 at none against 데이프렙's shown. 데이프렙's advantage is iOS requirement (15.1 vs 17.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. 데이프렙 sells 10 in-app purchases, starting at $1.99 per month and 코드서재 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

데이프렙 ships an update every 6 days, 코드서재 every 4 days. The most recent releases landed on November 10, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 데이프렙 | 코드서재 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 days | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 79 MB | 22 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [dasong sim](https://appshunter.io/developer/1883683802) | [Hyeonu Kim](https://appshunter.io/developer/6810663636) |

## What reviewers say

### 데이프렙

[App page](https://appshunter.io/ios/app/cbt/id6802236999)

Prepare for multiple certification exams with a single app. Access over 80 exams and 230,000 questions, including national certifications, civil service, and NCS. Utilize free learning features or unlock premium content with subscriptions.

**Highlights:** Over 80 exams and 230,000 questions, Daily study planner, Subject selection and progress tracking, Detailed answer explanations, Spaced repetition for weak areas, Practice exams and past papers, Cross-device progress syncing

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 지텔프메이트 프리미엄 월간 | $1.99 | per month |
| 주택관리사보 2차 프리미엄 월간 | $2.99 | per month |
| ENmate 프리미엄 월간 | $2.99 | per month |
| 지텔프메이트 프리미엄 3개월 | $4.99 | per 3 months |
| 주택관리사보 2차 프리미엄 3개월 | $5.99 | per 3 months |
| ENmate 프리미엄 3개월 | $5.99 | per 3 months |
| 지텔프메이트 프리미엄 평생 | $7.99 | one-time |
| 주택관리사보 2차 프리미엄 평생 | $14.99 | one-time |
| 영양사 프리미엄 평생 | $17.99 | one-time |
| ENmate 프리미엄 평생 | $19.99 | one-time |


### 코드서재

[App page](https://appshunter.io/ios/app/id6811868964)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 코드서재 전체 과정 | $6.99 | one-time |


## Frequently asked questions

### Is 데이프렙 free?

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

### Is 코드서재 free?

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

### Do 데이프렙 or 코드서재 have ads?

데이프렙 shows ads; 코드서재 does not.

### Which is updated more often, 데이프렙 or 코드서재?

데이프렙 ships an update every 6 days, and 코드서재 every 4 days. Most recently, 데이프렙 was updated on November 10, 2026 and 코드서재 on October 31, 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.*