# DTD CODE vs EBook sách hay

The clearest difference is in-app purchases: DTD CODE at none against EBook sách hay's 10. DTD CODE also leads on iOS requirement (9.0 vs 15.0). EBook sách hay's advantage is update cadence (fortnightly vs every 7 months). On price, ads and device support there is nothing between them.

Both are free to download. EBook sách hay sells 9 one-off in-app purchases. DTD CODE asks for nothing beyond the download.

DTD CODE ships an update every 7 months, EBook sách hay fortnightly. Both last shipped on October 2, 2026.

## The numbers

| Metric | DTD CODE | EBook sách hay |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Fortnightly** |
| Size | 9 MB | 53 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nguyen Cong Quyet](https://appshunter.io/developer/1289112760) | [Hoang Thuong Vu](https://appshunter.io/developer/1709848945) |

## What reviewers say

### DTD CODE

[App page](https://appshunter.io/ios/app/dtd-code/id1436681566)

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

**In-app purchases:** none


### EBook sách hay

[App page](https://appshunter.io/ios/app/ebook-sach-hay/id6468387653)

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 25 coins | $0.29 | one-time |
| 20 coins | $0.29 | one-time |
| 50 coins | $0.49 | one-time |
| 100 coins | $0.99 | one-time |
| 200 coins | $1.99 | one-time |
| 300 coins | $2.99 | one-time |
| 500 coins | $4.99 | one-time |
| 700 coins | $6.99 | one-time |
| 1000 coins | $9.99 | one-time |


## Frequently asked questions

### Is DTD CODE free?

DTD CODE is free to download, with no in-app purchases.

### Is EBook sách hay free?

EBook sách hay is free to download, with in-app purchases available.

### Do DTD CODE or EBook sách hay have ads?

Neither DTD CODE nor EBook sách hay shows ads.

### Which is updated more often, DTD CODE or EBook sách hay?

DTD CODE ships an update every 7 months, and EBook sách hay fortnightly. Most recently, DTD CODE was updated on October 2, 2026 and EBook sách hay on October 2, 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.*