# Online Mariner Skills vs Shipstructures

The clearest difference is price: Online Mariner Skills at Free against Shipstructures's $0.99. Shipstructures's advantage is iOS requirement (8.0 vs 12.0). On ads, in-app purchases and device support there is nothing between them.

Online Mariner Skills is free to download; Shipstructures costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Online Mariner Skills | Shipstructures |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 36 months | — |
| Size | 15 MB | 48 MB |
| Requires iOS | 12.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | +4 |
| Developer | [Mariner Skills, LLC.](https://appshunter.io/developer/1679660337) | [OLEKSANDR IZERGIN](https://appshunter.io/developer/1678396126) |

## What reviewers say

### Online Mariner Skills

[App page](https://appshunter.io/ios/app/online-mariner-skills/id6450008152)

**Features:** macOS Compatibility

**In-app purchases:** none


### Shipstructures

[App page](https://appshunter.io/ios/app/shipstructures/id6451042182)

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

**In-app purchases:** none


## Frequently asked questions

### Is Online Mariner Skills free?

Online Mariner Skills is free to download, with no in-app purchases.

### Is Shipstructures free?

Shipstructures costs $0.99, with no in-app purchases.

### Do Online Mariner Skills or Shipstructures have ads?

Neither Online Mariner Skills nor Shipstructures shows ads.

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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.*