# DIVE DIWA vs 海之家課程 Sea Dynamics Course

The clearest difference is in-app purchases: DIVE DIWA at none against 海之家課程 Sea Dynamics Course's 7. On price, update cadence, ads 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. DIVE DIWA asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 8 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | DIVE DIWA | 海之家課程 Sea Dynamics Course |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | Every 8 months |
| Size | 70 MB | 40 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [DIWA Holding Limited](https://appshunter.io/developer/1743120478) | [Sea Dynamics](https://appshunter.io/developer/1676724147) |

## What reviewers say

### DIVE DIWA

[App page](https://appshunter.io/ios/app/dive-diwa/id1661127903)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is DIVE DIWA free?

DIVE DIWA is free to download, with no in-app purchases.

### 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.

### Do DIVE DIWA or 海之家課程 Sea Dynamics Course have ads?

Neither DIVE DIWA nor 海之家課程 Sea Dynamics Course shows ads.

### Which is updated more often, DIVE DIWA or 海之家課程 Sea Dynamics Course?

DIVE DIWA ships an update every 8 months, and 海之家課程 Sea Dynamics Course every 8 months. Most recently, DIVE DIWA was updated on November 3, 2026 and 海之家課程 Sea Dynamics Course on November 3, 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.*