# OpenSeaMap vs Marine Contract Tracker

The clearest difference is price: OpenSeaMap at Free against Marine Contract Tracker's $1.99. Marine Contract Tracker's advantage is in-app purchases (none vs 1) and iOS requirement (14.0 vs 18.6). On ads and device support there is nothing between them.

OpenSeaMap is free to download; Marine Contract Tracker costs $1.99 up front. OpenSeaMap sells 1 one-off in-app purchase. Marine Contract Tracker asks for nothing beyond the download.

## The numbers

| Metric | OpenSeaMap | Marine Contract Tracker |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/openseamap/id495210783/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 38.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 13 MB | 24 MB |
| Requires iOS | 18.6 | **14.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [appdoctors UG](https://appshunter.io/developer/961029450) | [Stanislav Soroka](https://appshunter.io/developer/1701402639) |

## What reviewers say

### OpenSeaMap

[App page](https://appshunter.io/ios/app/openseamap/id495210783)

This app provides a free, worldwide nautical chart with detailed sea information, including lights, weather data, and harbor details. It offers chartplotting, waypoint management, and offline map caching for navigation. Users can mark locations, enter coordinates, and adjust chart zoom for optimal viewing.

**Highlights:** Free worldwide sea chart, Chartplotting with tracking, Waypoint creation and export, Offline map caching, Mark and search locations, Adjustable chart zoom

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OpenSeaMap Professional | $1.99 | one-time |


### Marine Contract Tracker

[App page](https://appshunter.io/ios/app/marine-contract-tracker/id6745448753)

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

**In-app purchases:** none


## Frequently asked questions

### Is OpenSeaMap free?

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

### Is Marine Contract Tracker free?

Marine Contract Tracker costs $1.99, with no in-app purchases.

### Do OpenSeaMap or Marine Contract Tracker have ads?

Neither OpenSeaMap nor Marine Contract Tracker 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.*