Comparison

OpenSeaMap vs Marine Navigation Lite

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

Head to head
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.

About

Marine Navigation Lite

This app offers offline GPS charting for marine use, allowing users to own their maps permanently. It provides advanced navigation tools, custom map creation from any image, and respects user privacy by not tracking or selling data.

Highlights
  • Lifetime map ownership
  • Offline GPS charting
  • Custom map creation from images
  • Global offline tides
  • Fish forecast
  • Advanced visual waypoints
Features
Read full description

MARINE NAVIGATION — Offline GPS Chartplotter You Own Forever Tired of apps renting your maps every year? Worried about your secret fishing spots being tracked or sold? It’s time to take back control. Marine Navigation is the GPS chartplotter you buy once and own for life. No hidden fees, no forced subscriptions. Since 2009, sailors, fishermen, and sea lovers have trusted us for reliable, offline navigation that respects their privacy. CHOOSE YOUR WAY TO NAVIGATE - Try Free: Download Marine Navigation Lite to explore the basics. - Full Version (One-Time Purchase): Get the complete offline chartplotter that’s yours forever. - Go PRO (Optional Subscription): Unlock professional-grade tools and navigate without limits. Your choice: own it once, or subscribe for more — total freedom. GO PRO — THE ULTIMATE NAVIGATION For the serious navigator, we built something extraordinary. The PRO version is more than just features; - PROPRIETARY S57 ENGINE: This is our masterpiece. Our custom S57 renderer brings official Electronic Navigational Charts (ENC) to your device with a speed and detail once reserved for systems costing thousands. - UNLIMITED CUSTOM MAPS: Our most revolutionary feature, supercharged. Scan a paper chart, import a satellite image of a wreck, or even use a treasure map. Our powerful georeferencing tool lets you turn any image into a fully navigable, offline chart in minutes. Your knowledge, mapped. - GLOBAL OFFLINE TIDES: Accurate tidal data for any point on the map, calculated on your device. No internet needed, powered by the high-precision FES2022b global model. - ADVANCED TOOLS: Overlay multiple maps, adjust transparency, and gain a level of control that competitors simply cannot match. - FISH FORECAST (NEW): Fish Forecast helps you plan fishing trips with an Activity Score, built from Solunar, plus real fishing weather and ocean conditions. YOUR DATA IS SACRED We respect your privacy. We don’t track you. We don’t analyze your locations. We never sell your data. Everything you save stays safely on your device. Your fishing spots remain yours — always. FULL VERSION — EVERYTHING YOU NEED - RELIABLE OFFLINE MAPS: Download your charts and navigate with confidence far from shore. Our entire download system has been rebuilt from the ground up based on user feedback for total clarity and control. - COMPLETE GPS NAVIGATION: Create routes, record tracks, set a visual anchor alarm, use the compass (true/magnetic), and monitor your speed and direction. - NEW! ADVANCED VISUAL WAYPOINTS: Take total control of your map. Organize your spots with a library of custom icons and colors, then go beyond a simple pin: turn your chart into an intelligent log. Tag any location with the exact bait that worked, the type of fishing, catch details, and other crucial conditions. - WIDE CHART SELECTION: Access NOAA Raster & ENC, ESRI Satellite Imagery, OpenSeaMap, Bathymetric Maps, and more. - USEFUL TOOLS: Basic weather, moon & sun phases, GPX import/export. WHY CHOOSE MARINE NAVIGATION? - Freedom of Choice: Buy once for life, or subscribe to PRO — you decide. - Privacy First: Your data stays on your device, period. - Unmatched Control: From official S57 charts to your own custom maps. - Trusted by Navigators Worldwide: Reliable and independent since 2009. IMPORTANT NOTICE Good seamanship requires the use of official charts. Marine Navigation is for use with other charts and cannot replace official charts. Use at your own risk. SUBSCRIPTION INFORMATION - The PRO subscription renews automatically unless turned off at least 24 hours before the end of the current period. - You can manage or disable auto-renew in your iTunes Account Settings after purchase. --- Learn more on our official website: www.fishpoints.net Terms of Use: http://www.fishpoints.net/eula/ Privacy Policy: http://www.fishpoints.net/privacy-policy/ Try Marine Navigation and take the helm of your journey. The sea is yours.

Screenshots

OpenSeaMap4 screens
Marine Navigation Lite4 screens

Verdict

The call

The clearest difference is ads: OpenSeaMap at none against Marine Navigation Lite's shown. OpenSeaMap also leads on review sentiment (38% vs 3%). Marine Navigation Lite's advantage is update cadence (weekly vs every 2 months) and iOS requirement (16.0 vs 18.6). On price, in-app purchases, monetization model 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 and Marine Navigation Lite sells 10 in-app purchases, starting at $0.99 per 6 months. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

OpenSeaMap ships an update every 2 months, Marine Navigation Lite weekly. The most recent releases landed on September 21, 2026 and September 25, 2026 respectively.

Scorecard4 real differences · 6 level
OpenSeaMap versus Marine Navigation Lite: the parameters behind the verdict, then further details
ParameterOpenSeaMapMarine Navigation Lite
PriceFreeFree
Rating1.0 (1 ratings) — better—
Positive reviews38.3% of reviews — better3.4% of reviews
Number of ratings1 — better—
Update frequencyEvery 2 monthsWeekly — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.616.0 — better
Further details — not scored
Size13 MB106 MB
Age rating4+17+
Developerappdoctors UGMarco Palaferri

Customer experience

OpenSeaMap

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

Marine Navigation Lite

Written reviews29 reviews
Positive3.4%
Neutral0.0%
Negative96.6%

In-app purchases

1 purchases

OpenSeaMap

One-time1
  • OpenSeaMap Professional$1.99
10 purchases

Marine Navigation Lite

Subscriptions8
  • Remove Ads SixMonths$0.996 Months
  • Monthly Subscription$0.991 Month
  • Remove Ads (1 Year)$1.491 Year
Show 5 more
  • 6 Months Subscription$4.496 Months
  • Update to Full Version 6Months$4.996 Months
  • Pro$5.991 Year
  • Update to Full Version 1 Year$6.991 Year
  • 1 Year Subscription$7.991 Year
One-time2
  • Remove Ads Forever$2.99
  • Full Version Forever$19.99

Questions

Is OpenSeaMap free?
OpenSeaMap is free to download, with in-app purchases available.
Is Marine Navigation Lite free?
Marine Navigation Lite is free to download, with in-app purchases available.
Do OpenSeaMap or Marine Navigation Lite have ads?
Marine Navigation Lite shows ads; OpenSeaMap does not.
Which is updated more often, OpenSeaMap or Marine Navigation Lite?
OpenSeaMap ships an update every 2 months, and Marine Navigation Lite weekly. Most recently, OpenSeaMap was updated on September 21, 2026 and Marine Navigation Lite on September 25, 2026.

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