# 海之家課程 Sea Dynamics Course vs HK Customs Interview Prep

The clearest difference is update cadence: HK Customs Interview Prep at every 5 days against 海之家課程 Sea Dynamics Course's every 8 months. 海之家課程 Sea Dynamics Course's advantage is iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 海之家課程 Sea Dynamics Course sells 7 one-off in-app purchases and HK Customs Interview Prep sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

海之家課程 Sea Dynamics Course ships an update every 8 months, HK Customs Interview Prep every 5 days. The most recent releases landed on September 10, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | 海之家課程 Sea Dynamics Course | HK Customs Interview Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 5 days** |
| Size | 40 MB | 85 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sea Dynamics](https://appshunter.io/developer/1676724147) | [Pickmy AI](https://appshunter.io/developer/1869516043) |

## What reviewers say

### 海之家課程 Sea Dynamics Course

[App page](https://appshunter.io/ios/app/sea-dynamics-course/id6470789318)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Local Knowledge, EN, 3 Months | $399.99 | one-time |
| Grade 2A,English, 2 months | $399.99 | one-time |
| Grade 2B,English, 2 months | $399.99 | one-time |
| 二級操作人甲部,粵語繁體, 二個月 | $399.99 | one-time |
| 二級操作人乙部,粵語繁體, 二個月 | $399.99 | one-time |
| Grade 2 Part A&B, EN, 3 months | $799.99 | one-time |
| 二級操作人(甲部+乙部), 粵語繁體, 3個月 | $799.99 | one-time |


### HK Customs Interview Prep

[App page](https://appshunter.io/ios/app/hk-customs-interview-prep/id6795889851)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 180-Day Pro | $19.99 | one-time |


## Frequently asked questions

### Is 海之家課程 Sea Dynamics Course free?

海之家課程 Sea Dynamics Course is free to download, with in-app purchases available.

### Is HK Customs Interview Prep free?

HK Customs Interview Prep is free to download, with in-app purchases available.

### Do 海之家課程 Sea Dynamics Course or HK Customs Interview Prep have ads?

Neither 海之家課程 Sea Dynamics Course nor HK Customs Interview Prep shows ads.

### Which is updated more often, 海之家課程 Sea Dynamics Course or HK Customs Interview Prep?

海之家課程 Sea Dynamics Course ships an update every 8 months, and HK Customs Interview Prep every 5 days. Most recently, 海之家課程 Sea Dynamics Course was updated on September 10, 2026 and HK Customs Interview Prep on September 20, 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.*