# SQLmate vs 코드서재

The clearest difference is ads: 코드서재 at none against SQLmate's shown. SQLmate'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. SQLmate sells 1 in-app purchase, 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.

SQLmate ships an update every 9 days, 코드서재 every 4 days. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | SQLmate | 코드서재 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 102 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

### SQLmate

[App page](https://appshunter.io/ios/app/sqlmate-sqld/id6763740901)

This app helps you prepare for the SQLD certification exam by focusing on effective review and identifying your weaknesses. It uses a science-based algorithm to schedule reviews and provides detailed explanations and practice tests to ensure you retain information.

**Highlights:** FSRS smart review scheduling, Concept learning with 135 lessons, 4,325 practice questions, Detailed explanations, Weakness analysis heatmap, Offline learning support, Mock exams

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 프리미엄 월간 | $1.99 | per month |


### 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 SQLmate free?

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

### Is 코드서재 free?

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

### Do SQLmate or 코드서재 have ads?

SQLmate shows ads; 코드서재 does not.

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

SQLmate ships an update every 9 days, and 코드서재 every 4 days. Most recently, SQLmate was updated on November 9, 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.*