# HSK Master vs KNB Online

The clearest difference is in-app purchases: KNB Online at none against HSK Master's 1. KNB Online also leads on ads (none vs shown). HSK Master's advantage is iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.

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

## The numbers

| Metric | HSK Master | KNB Online |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 days | — |
| Size | 28 MB | 35 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [JIHUN JO](https://appshunter.io/developer/1855392770) | [HISOFT VIET NAM JOINT STOCK COMPANY](https://appshunter.io/developer/1623517134) |

## What reviewers say

### HSK Master

[App page](https://appshunter.io/ios/app/hsk-master/id6756893592)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### KNB Online

[App page](https://appshunter.io/ios/app/knb-online/id6809713657)

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

**In-app purchases:** none


## Frequently asked questions

### Is HSK Master free?

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

### Is KNB Online free?

KNB Online is free to download, with no in-app purchases.

### Do HSK Master or KNB Online have ads?

HSK Master shows ads; KNB Online does not.

---

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