# OpenSeaMap vs Germany HD GPS Nautical Chart

The clearest difference is price: OpenSeaMap at Free against Germany HD GPS Nautical Chart's $19.99. OpenSeaMap also leads on review sentiment (38% vs 0%) and update cadence (every 2 months vs every 10 months). Germany HD GPS Nautical Chart's advantage is iOS requirement (12.0 vs 18.6). On ads, in-app purchases and device support there is nothing between them.

OpenSeaMap is free to download; Germany HD GPS Nautical Chart costs $19.99 up front. OpenSeaMap sells 1 one-off in-app purchase and Germany HD GPS Nautical Chart sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

OpenSeaMap ships an update every 2 months, Germany HD GPS Nautical Chart every 10 months. The most recent releases landed on October 21, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | OpenSeaMap | Germany HD GPS Nautical Chart |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/openseamap/id495210783/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **38.3% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 10 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 13 MB | 213 MB |
| Requires iOS | 18.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [appdoctors UG](https://appshunter.io/developer/961029450) | [Flytomap](https://appshunter.io/developer/297575434) |

## 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 |


### Germany HD GPS Nautical Chart

[App page](https://appshunter.io/ios/app/germany-hd-gps-nautical-chart/id892003249)

This app provides detailed nautical charts and marine weather forecasts for Germany, working offline without mobile coverage. It offers advanced navigation tools like route planning, distance measurement, and GPS tracking, along with extensive map overlays and user-friendly features for boaters.

**Highlights:** Offline nautical charts for Germany, Marine weather forecasts, GPS tracking and heading vector, Distance measurement tool, Route planning with unlimited waypoints, Map overlays (satellite, terrain), Works in background mode

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MOB - Quick Waypoint | $1.99 | one-time |


## Frequently asked questions

### Is OpenSeaMap free?

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

### Is Germany HD GPS Nautical Chart free?

Germany HD GPS Nautical Chart costs $19.99, and also offers in-app purchases.

### Do OpenSeaMap or Germany HD GPS Nautical Chart have ads?

Neither OpenSeaMap nor Germany HD GPS Nautical Chart shows ads.

### Which is updated more often, OpenSeaMap or Germany HD GPS Nautical Chart?

OpenSeaMap ships an update every 2 months, and Germany HD GPS Nautical Chart every 10 months. Most recently, OpenSeaMap was updated on October 21, 2026 and Germany HD GPS Nautical Chart on October 20, 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.*