# SeaHelp vs OpenSeaMap

The clearest difference is review sentiment: SeaHelp at 100% against OpenSeaMap's 38%. SeaHelp also leads on rating (4.4 vs 1.0) and in-app purchases (none vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. OpenSeaMap sells 1 one-off in-app purchase. SeaHelp asks for nothing beyond the download.

SeaHelp holds the better App Store score, 4.4 against 1.0. That said, the two scores are not equally well evidenced: SeaHelp has 34 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of SeaHelp's written reviews are positive against 38% of OpenSeaMap's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on July 18, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | SeaHelp | OpenSeaMap |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (34 ratings)](https://appshunter.io/ios/app/seahelp/id387967419/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/openseamap/id495210783/reviews) |
| Number of ratings | **34** | 1 |
| Positive reviews | **100.0% of reviews** | 38.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 15 MB | 13 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sea-Help GmbH](https://appshunter.io/developer/909091275) | [appdoctors UG](https://appshunter.io/developer/961029450) |

## What reviewers say

### SeaHelp

[App page](https://appshunter.io/ios/app/seahelp/id387967419)

This app provides immediate professional assistance for boaters in distress in specific European coastal areas. It sends your location and contact details to a central operations center, which then contacts you to arrange support. Membership offers priority treatment during emergencies.

**Highlights:** Emergency help button via SMS, Automatic GPS coordinate transfer, Direct contact from operations center, Membership for priority treatment, Access to SeaHelp website, Downloadable SeaMagazine

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is SeaHelp free?

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

### Is OpenSeaMap free?

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

### Which has better reviews, SeaHelp or OpenSeaMap?

SeaHelp is rated higher. SeaHelp averages 4.4 out of 5 from 34 ratings, while OpenSeaMap averages 1.0 from 1 ratings.

### Do SeaHelp or OpenSeaMap have ads?

Neither SeaHelp nor OpenSeaMap shows ads.

### Which is updated more often, SeaHelp or OpenSeaMap?

SeaHelp ships an update every 2 months, and OpenSeaMap every 2 months. Most recently, SeaHelp was updated on July 18, 2026 and OpenSeaMap on September 21, 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.*