# 회독HSK vs SpeedJack 21

The clearest difference is price: SpeedJack 21 at Free against 회독HSK's $19.99. SpeedJack 21 also leads on update cadence (fortnightly vs monthly) and iOS requirement (13.0 vs 15.6). 회독HSK's advantage is ads (none vs shown). On in-app purchases and device support there is nothing between them.

SpeedJack 21 is free to download; 회독HSK costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

회독HSK ships an update monthly, SpeedJack 21 fortnightly. The most recent releases landed on September 23, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | 회독HSK | SpeedJack 21 |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/speedjack-21/id1511287771/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 95.8% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Paid | **Ad-supported** |
| Size | 24 MB | 86 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [LEE YONGHEE](https://appshunter.io/developer/662017989) | [KwangRim Ahn](https://appshunter.io/developer/1511287770) |

## What reviewers say

### 회독HSK

[App page](https://appshunter.io/ios/app/hsk/id1459671308)

Prepare for the Chinese proficiency test (HSK) with this comprehensive vocabulary app. It offers audio support, example sentences, a personal vocabulary list, and a quick review feature. Enjoy an ad-free experience with night and landscape modes for comfortable study.

**Highlights:** HSK vocabulary builder, Audio pronunciation support, Example sentences, Personalized word lists, Quick review function, Night mode, Ad-free experience

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

**In-app purchases:** none


### SpeedJack 21

[App page](https://appshunter.io/ios/app/speedjack-21/id1511287771)

Practice your blackjack basic strategy with this educational app. Achieve consecutive correct answers to rank your time record on the server and improve your casino winning average.

**Highlights:** Blackjack basic strategy practice, Consecutive correct answer challenge, Server-based time ranking, Improve casino winning average, User sign-in required for challenges

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 회독HSK free?

회독HSK costs $19.99, with no in-app purchases.

### Is SpeedJack 21 free?

SpeedJack 21 is free to download, with no in-app purchases.

### Do 회독HSK or SpeedJack 21 have ads?

SpeedJack 21 shows ads; 회독HSK does not.

### Which is updated more often, 회독HSK or SpeedJack 21?

회독HSK ships an update monthly, and SpeedJack 21 fortnightly. Most recently, 회독HSK was updated on September 23, 2026 and SpeedJack 21 on June 4, 2026.

---

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