iSailGPS : NOAA USA RNC Charts

iSailGPS : NOAA USA RNC Charts

Marine Nautical Chart Plotter

71 ratings
70 reviews
#126 in paid Navigation
✈️ Travel
🗺️ Navigation
$7.99

Price history


Details

  • Released
  • Updated
  • April 29, 2011
  • April 24, 2026
iSailGPS : NOAA USA RNC Charts screenshot #1 for iPhone
iSailGPS : NOAA USA RNC Charts screenshot #2 for iPhone
iSailGPS : NOAA USA RNC Charts screenshot #3 for iPhone
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iSailGPS : NOAA USA RNC Charts screenshot #6 for iPhone
iSailGPS : NOAA USA RNC Charts screenshot #7 for iPhone
iSailGPS : NOAA USA RNC Charts screenshot #8 for iPhone
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About

Transform your device into a powerful GPS navigation tool with detailed US NOAA nautical charts. Navigate safely even without a cell signal, track your journey, set waypoints, and create custom routes. Ideal for sailors and boaters needing reliable marine navigation.

USA NOAA Raster Nautical Charts
Offline GPS navigation
Track recording and display
Waypoint and route creation
Man Overboard (MOB) function
GPX/KML file import/export
Sun & moon position tracking
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What's New in iSailGPS

9.6.9

April 24, 2026

Improved wording on some Alerts and Notifications. What's new in iSailGPS when compared with other available NOAA chart apps? • You don't just see Waypoints and Routes displayed on the chart, you can actually do real great circle navigation to those Waypoints and along those Routes. You get information such as Estimated Time of Arrival, current bearing, heading and cross-track error, and remaining distances to your intermediate and final destinations. • You don't just see individual charts. Whenever the map projection is compatible (which it is most cases), you can see adjacent charts with their margins removed stitched together seamlessly, even when the chart scales are different. For example you can see the approach chart and the corresponding harbor detail chart both together on the same screen. • You can create, import, edit, export, and navigate both on routes based on a recorded or imported path, and on routes based on a series of waypoints. • Get the weather report and forecast, the sun and moon position, rise and set times, and driving directions to the dock for any point on a chart with a few taps. • iSailGPS's code size is kept very small by efficient programming so in an emergency, you can download it easily even over a weak cell connection. • The current version of iSailGPS runs on the latest devices and also on older devices with older versions of iOS , all the way back to devices such as the iPhone 6. • There is never any confusion over what charts you have available offline. They are clearly listed by NOAA chart name and number, and shown on an overview map. • Check the App Privacy section. We don't know who you are when you are using iSailGPS. We never send your current location or your recorded track to our servers. Hence we cannot and don't use your location data. We cannot and don't provide your location data to anyone else. Unlike other mapping apps that profit from using your location data in ways that do not keep it private, iSailGPS maintains the highest level of data confidentially.

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Charts

Top Paid

📉 126-12

Navigation

This app dropped -12 positions in Navigation chart.

Last updated on July 23, 2026.

User reviews

E Norm

Great App! Had it about 6 years now and it’s awesome, nothing better available in its class!

I like it!

I Haven’t used it much but it just pleases me.
High res Raster charts, to the point, fast, reminds me of GPSNavX that I still use today.
Many thanks!

Ok, problem with HDG and COG.
Compass heading is terribly dangerous, we should be able to disable it.
Course on ground should be always on and efficient.
Down to three stars for me, sad!
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Simple accurate actual charts

I miss charts. This is by far my favorite app for sailing. No distractions, just clear accurate markings on a proper chart!

I like it!

I Haven’t used it much but it just pleases me.
High res Raster charts, to the point, fast, reminds me of GPSNavX that I still use today.
Many thanks!

Poor chart management

The main problem for me is the inability to stitch together a see less chart and being able to get the best detail for the area automatically. I’ve been playing with app for awhile now and when I get to the chart boundary I can often get the next chart to show by double tapping the white area outside of it. And sometimes, I think, it seems to have successfully stitched together into a single, larger chart. But, it may not have the sufficient detail I need for a particular port. At that point I’m forced to go to my downloaded charts and find it. Not so simple as I now have a long list of charts. This can be impractical to do on the water unless you have a dedicated navigator. When approaching a busy area I don’t want to take my eyes off the water and be scrolling through a list of charts trying to find the appropriate detail. Maybe I’m missing something but for me other apps with paid subscriptions work a lot better. There’s just no chart management needed, and you can find them for as little as $5/year (at least for my area - eastern US coast).
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Developer apps

FAQ

What does iSailGPS do?

iSailGPS turns your iPhone or iPad into a high-performance GPS receiver using USA NOAA Raster Nautical Charts. It allows for offline navigation, tracking your journey, setting waypoints, creating routes, and provides essential navigation data like course, speed, and estimated time of arrival.

What are the key features of iSailGPS?

Key features include access to all USA NOAA RNC Charts for offline use, recording and displaying tracks, marking waypoints, creating and navigating routes, a Man Overboard (MOB) function, and the ability to import/export GPX and KML files. It also shows sun and moon positions.

How much does iSailGPS cost?

The app is available for a one-time low price, with everything included. There are no sign-ups, ads, subscriptions, or in-app purchases, ensuring your privacy is respected.

Is iSailGPS compatible with my device?

The application is designed for iPhone and iPad devices. Specific compatibility details, such as supported iOS versions, can typically be found on the app's store page.

When would I use iSailGPS?

You would use iSailGPS for marine navigation, especially in areas with no cell signal, during storms, or when a chart plotter fails. It's ideal for everyday sailing, racing, and ensuring safe return to port.