# Kingdemy vs Vessel Inspector

The clearest difference is in-app purchases: Vessel Inspector at none against Kingdemy's 4. Vessel Inspector also leads on update cadence (every 6 weeks vs every 14 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Kingdemy sells 4 one-off in-app purchases. Vessel Inspector asks for nothing beyond the download.

Kingdemy ships an update every 14 months, Vessel Inspector every 6 weeks. The most recent releases landed on September 19, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Kingdemy | Vessel Inspector |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 6 weeks** |
| Size | 93 MB | 198 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [JETKING INFOTRAIN LIMITED](https://appshunter.io/developer/1484036382) | [PALS EDUTECH](https://appshunter.io/developer/1492111951) |

## What reviewers say

### Kingdemy

[App page](https://appshunter.io/ios/app/kingdemy/id1484036383)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| English for Vietnamese bundle | $1.99 | one-time |
| Crazy Rich Book | $2.99 | one-time |
| Crazy Rich Combo Course | $13.99 | one-time |
| Crazy Rich doing what you love | $16.99 | one-time |


### Vessel Inspector

[App page](https://appshunter.io/ios/app/vessel-inspector/id1492111952)

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

**In-app purchases:** none


## Frequently asked questions

### Is Kingdemy free?

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

### Is Vessel Inspector free?

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

### Do Kingdemy or Vessel Inspector have ads?

Neither Kingdemy nor Vessel Inspector shows ads.

### Which is updated more often, Kingdemy or Vessel Inspector?

Kingdemy ships an update every 14 months, and Vessel Inspector every 6 weeks. Most recently, Kingdemy was updated on September 19, 2026 and Vessel Inspector on October 24, 2026.

---

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