# ClassNK Directory vs Maritime7

The clearest difference is update cadence: Maritime7 at monthly against ClassNK Directory's every 10 months. Maritime7 also leads on 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. Neither carries in-app purchases, so what you see is what you pay.

ClassNK Directory ships an update every 10 months, Maritime7 monthly. The most recent releases landed on October 20, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | ClassNK Directory | Maritime7 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/classnk-directory/id956676438/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Monthly** |
| Monetization | Free | — |
| Size | 15 MB | 52 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [NIPPON KAIJI KYOKAI GENERAL INCORPORATED FOUNDATION](https://appshunter.io/developer/956676437) | [Zabooon, Inc](https://appshunter.io/developer/1655260613) |

## What reviewers say

### ClassNK Directory

[App page](https://appshunter.io/ios/app/classnk-directory/id956676438)

Easily find contact details for a global network of survey offices. Search for locations by port, country, or keywords, and view them on Google Maps.

**Highlights:** Worldwide office network access, Contact information for global offices, Search offices by port, country, or keywords, View office locations on Google Maps, Access staff details

**Features:** macOS Compatibility

**In-app purchases:** none


### Maritime7

[App page](https://appshunter.io/ios/app/maritime7/id6444545966)

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

**In-app purchases:** none


## Frequently asked questions

### Is ClassNK Directory free?

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

### Is Maritime7 free?

Maritime7 is free to download, with no in-app purchases.

### Do ClassNK Directory or Maritime7 have ads?

Neither ClassNK Directory nor Maritime7 shows ads.

### Which is updated more often, ClassNK Directory or Maritime7?

ClassNK Directory ships an update every 10 months, and Maritime7 monthly. Most recently, ClassNK Directory was updated on October 20, 2026 and Maritime7 on October 6, 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.*