# ClassNK Onboard Image Logger vs Class surveyor

The clearest difference is iOS requirement: Class surveyor at 11.0 against ClassNK Onboard Image Logger's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

ClassNK Onboard Image Logger ships an update every 9 months, Class surveyor every 7 months. The most recent releases landed on October 25, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | ClassNK Onboard Image Logger | Class surveyor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 7 months** |
| Size | 48 MB | 58 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [NIPPON KAIJI KYOKAI GENERAL INCORPORATED FOUNDATION](https://appshunter.io/developer/956676437) | [OLEKSANDR IZERGIN](https://appshunter.io/developer/1678396126) |

## What reviewers say

### ClassNK Onboard Image Logger

[App page](https://appshunter.io/ios/app/classnk-onboard-image-logger/id1614585559)

**In-app purchases:** none


### Class surveyor

[App page](https://appshunter.io/ios/app/class-surveyor/id6450609017)

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

**In-app purchases:** none


## Frequently asked questions

### Is ClassNK Onboard Image Logger free?

ClassNK Onboard Image Logger is free to download, with no in-app purchases.

### Is Class surveyor free?

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

### Do ClassNK Onboard Image Logger or Class surveyor have ads?

Neither ClassNK Onboard Image Logger nor Class surveyor shows ads.

### Which is updated more often, ClassNK Onboard Image Logger or Class surveyor?

ClassNK Onboard Image Logger ships an update every 9 months, and Class surveyor every 7 months. Most recently, ClassNK Onboard Image Logger was updated on October 25, 2026 and Class surveyor on October 10, 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.*