# 海之家課程 Sea Dynamics Course vs spellfie

The clearest difference is in-app purchases: spellfie at none against 海之家課程 Sea Dynamics Course's 7. spellfie also leads on update cadence (every 6 days vs every 8 months). 海之家課程 Sea Dynamics Course's advantage is iOS requirement (12.0 vs 14.0). On price, 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. spellfie asks for nothing beyond the download.

海之家課程 Sea Dynamics Course ships an update every 8 months, spellfie every 6 days. The most recent releases landed on October 6, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | 海之家課程 Sea Dynamics Course | spellfie |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 6 days** |
| Size | 40 MB | 287 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Sea Dynamics](https://appshunter.io/developer/1676724147) | [Secmenu Technology Limited](https://appshunter.io/developer/964395558) |

## 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 |


### spellfie

[App page](https://appshunter.io/ios/app/spellfie-11-plus-test/id6783809779)

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

**In-app purchases:** none


## 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 spellfie free?

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

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

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

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

海之家課程 Sea Dynamics Course ships an update every 8 months, and spellfie every 6 days. Most recently, 海之家課程 Sea Dynamics Course was updated on October 6, 2026 and spellfie on October 10, 2026.

---

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