# Vessel Inspector vs MSS Sea

Vessel Inspector and MSS Sea are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 5 weeks. The most recent releases landed on October 10, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Vessel Inspector | MSS Sea |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | Every 5 weeks |
| Size | 192 MB | 25 MB |
| Requires iOS | 15.0 | 15 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PALS EDUTECH](https://appshunter.io/developer/1492111951) | [Maersk Supply Service AS](https://appshunter.io/developer/1481439076) |

## What reviewers say

### Vessel Inspector

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

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

**In-app purchases:** none


### MSS Sea

[App page](https://appshunter.io/ios/app/mss-sea-learn/id1598307621)

**In-app purchases:** none


## Frequently asked questions

### Is Vessel Inspector free?

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

### Is MSS Sea free?

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

### Do Vessel Inspector or MSS Sea have ads?

Neither Vessel Inspector nor MSS Sea shows ads.

### Which is updated more often, Vessel Inspector or MSS Sea?

Vessel Inspector ships an update every 5 weeks, and MSS Sea every 5 weeks. Most recently, Vessel Inspector was updated on October 10, 2026 and MSS Sea on October 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.*