Comparison

SeaHelp vs OpenSeaMap

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SeaHelp

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
Read full description

SeaHelp – the breakdown service at sea   With this kind of service, SeaHelp App is offering to all skippers the possibilty of asking for professional help on short notice in breakdown or emergency situations in the areas of Croatia, Slovenia, Northern Italy and the Balearic Islands.   After activating the application, the help button has just to be pressed once in order to generate a SMS which will be received by the SeaHelp operations centre, tranferring the coordinates of the actual position, the mobile phone number and, in the case of a SeaHelp membership, as well the membership number. The SeaHelp operations centre will then promptly contact the skipper of the damaged boat by phone to get more detailed information and then will initiate the necessary supporting measures.  This service is aimed at all skippers in the operational area as mentioned above. Nevertheless, SeaHelp would like to point out that, given the case of several simultaneous emergency calls, there will be priority treatment for SeaHelp members. This service, though, on no account, is meant as a replacement for the conventional emergency alarm scenarios as established in seamanship but, at best, may serve as a supplement.    No internet link is required for the application of the SeaHelp emergency call function. Although, when using abroad roaming fees might occur, so, please contact your provider for information about the rates for using SMS and telephone services abroad.   Persons seeking help and not being SeaHelp members will be charged the accruing costs as indicated on the pricelist stated on our website under www.sea-help.eu . Please inform yourself before using this application for the first time.   In case you should find any mistakes within the information contained, we kindly ask you to advise us accordingly via the support sites indicated.   Range of functions: • Appeal for help via SMS to the SeaHelp operations centre indicating the coordinates of the actual position of the person seeking help, the mobile phone number for recalls from the SeaHelp operations centre and the SeaHelp membership number guaranteeing priority treatment in the case of several simultaneous requests for help. • Possibility of applying via iPhone for a SeaHelp membership, the breakdown service at sea and support point partner of the ADAC for the Croatia region as well as a cooperation partner of the ÖAMTC, the Austrian Sailing Federation and the Austrian Cruiser Federation.  Please note: activation of memebership will be made 24 hours after the application and receipt of payment by SeaHelp. • Direct access to the SeaHelp website. • Free of charge download of the printed edition of the SeaMagazine rehashed for iPhones.        Important notice: No liability will be assumed for the correct determination of the GPS coordinates by means of the iPhone as well as for the delivery of the SMS to SeaHelp.    This information is supplied without liability.

About

OpenSeaMap

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
Read full description

OpenSeaMap is a worldwide Opensource-project for creating a free nautical chart. Founded in 2009 the project gained a lot of attention lately adding more and more nautical information for free. Not even lights and other nautical infos are provided, but also more and more info layers like weather data, information about harbours and so on. As an add on to the OpenStreetMap this provides all missing info for nautical activities. OpenSeaMap is part of OpenStreetMap and uses the same database. FEATURES: - Free worldwide sea chart (incl. HD chart graphics) - Search for geolocations worldwide - Chartplotting with continuous tracking - Waypoints can easily be created, edited, deleted & exported - Mark locations in the chart - Zoom chart optically to fit your preferred reading size - Enter coordinates directly to be displayed in the chart - Offline caching of up to 1 million map tiles - Cleanup of chart cache data at any time To ensure future development and support of the OpenSeaMap app we encourage you to buy the In-App-Product "PRO". This will help keeping new updates and features coming. DISCLAIMER: OpenSeaMap is part of the OpenStreetMap and uses the same database. As an experienced navigator you should NEVER rely your descisions on one source of information alone. Please keep in mind that the OpenSeaMap can not replace official sea charts on bord of your boat. Please use the OpenSeaMap app only in conjunction with official sea charts and conforming to national and international regulations. Please recognize that no depth information is provided by this product. IMPORTANT: The continued use of the GPS can significantly decrease the battery level.

Screenshots

SeaHelp4 screens
OpenSeaMap4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard6 real differences · 4 level
SeaHelp versus OpenSeaMap: the parameters behind the verdict, then further details
ParameterSeaHelpOpenSeaMap
PriceFreeFree
Rating4.4 (34 ratings) — better1.0 (1 ratings)
Positive reviews100.0% of reviews — better38.3% of reviews
Number of ratings34 — better1
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better18.6
Further details — not scored
Size15 MB13 MB
Age rating4+4+
DeveloperSea-Help GmbHappdoctors UG

Customer experience

SeaHelp

All ratings34 ratings
Positive85.3%
Neutral2.9%
Negative11.8%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

OpenSeaMap

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews47 reviews
Positive38.3%
Neutral12.8%
Negative48.9%

In-app purchases

None

SeaHelp

No in-app purchases

1 purchases

OpenSeaMap

One-time1
  • OpenSeaMap Professional$1.99

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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