# Du vs HSK Training

The clearest difference is in-app purchases: HSK Training at none against Du's 1. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Du sells 1 one-off in-app purchase. HSK Training asks for nothing beyond the download.

## The numbers

| Metric | Du | HSK Training |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 9 days |
| Size | 55 MB | 52 MB |
| Requires iOS | 16.4 | 16.4 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Redd King LLC](https://appshunter.io/developer/555304700) | [joze kosmerl](https://appshunter.io/developer/6794506009) |

## What reviewers say

### Du

[App page](https://appshunter.io/ios/app/du-learn-chinese/id6777808844)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime | $1.99 | one-time |


### HSK Training

[App page](https://appshunter.io/ios/app/hsk-training/id6794506007)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Du free?

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

### Is HSK Training free?

HSK Training is free to download, with no in-app purchases.

### Do Du or HSK Training have ads?

Neither Du nor HSK Training shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*