SEAiq USA is a full-featured marine navigation app. It automatically downloads all charts (both vector and raster) from NOAA and the US Army Corps of Engineers for regions of USA you select.

Other features include:
* Waypoints
* Routes
* Tracks
* Night color modes
* Anchor alarm
* Automatic download and display of weather (wind & isobar)
* Chart measuring tools (EBL/VRM)
* WiFi-based NMEA and AIS
* Raster charts
* Vector charts

No purchase is required in order to use SEAiq USA to view charts. All features are enabled during a 7-day evaluation period. After that, many of the feautures require purchase of an in-app upgrade.

Continued use of GPS running in the background can dramatically decrease battery life.

What's New

Version 4.9.4

* Minor improvements and fixes
* Fix for possible crash in spoken alarms

Ratings and Reviews

4.7 out of 5
144 Ratings
144 Ratings
Tomas P



Just downloaded the 7-day trial with Premium and absolutely amazed at how much great info it has even for us non boaters (currently).

Keep up the GREAT app / updates / upgrades. Suggesting this app to my boating friends as we speak ;)


Dave Anderer

A LOT of function and value

I've looked at various iOS charting apps to find one that leveraged the information available on my boat network - speed, heading, COG, depth, etc. I never found anything that really met my needs.

I went back and found an app I had liked and rejected a year or so ago: SEAiq Pilot. There was a lot to like about the app but I'd be danged if I was going to spend $400 on an iOS app.

However... I discovered I was confused by how they sell their apps. There are really 3 different versions available:
* SEAiq Pilot is intended for use by professional pilots on big ships. It has a lot of features focused on that market such as showing separate course vectors for the bow and stern, showing the swept path of the vessel, showing a trial Rate of Turn, and tons of stuff I don't understand. $400
* SEAiq USA is the 'recreational' version of the program. It has 80%-90% of the functionality of Pilot. It can download and display NOAA and Army Corp of Engineer charts (vector and raster). $25
* SEAiq Open is the same as SEAiq USA but adds the ability to install S-63 as well as charts from PRIMAR and ChartWorld. $50

As a recreational boater my take on this is: $25 if you need the US Govt charts; $50 if you want to buy and load international charts.

So what did I get for my $25? The things that are important to me:
* Integrated, free downloads of NOAA charts
* Management and quilting of both vector and raster charts
* Decent WP and route creation (and no auto-route)
* Very nice route export/import/backup via GPX files
* Export of WPs to my MFDs via WPL sentences
* Very nice import/export/backup of the app configuration via files
* Excellent NMEA 0183 handling including diagnostic displays of sentences received, data, and errors
* Excellent handling and display of AIS data. AIS data is much more useful to me in this app than on my MFDs.

Nice to haves include:
* Tide and current options (several options, free and paid)
* Download and display of GRIB data
* Active Captain integration
* Various alarms
* A very cool anchor monitor

Also include with the app is the most detailed documentation I've seen in a product of this kind. The doc is available from within the app even when the app isn't connected to the internet. Maybe this is old-school but I view it s a huge positive.

I've dealt with their support on a few questions and received some of the best answers--quick, complete and informative.

I'll also note the apps are updated in the app store every few weeks. Again this appears to me to be a 'professional grade' offering with serious ongoing development.

The Intrepid Guy

Excellent App

I have been using this app now for about 2 years. Right now using it on an older gen 2 iPad that is a little slow but still works well. I use it beside my MFD while cruising as my main chart system. I find the charting and GPS to be really accurate! At this point I do not use the AIS function but do use with my Active Captain login.

I had an issue after an update but sent an email through the app and it was quickly fixed. Overall I'd say it's a really great program. With the ability to download the latest charts form NOAA for free you just can't bet it. I would recommend it to anyone at this point who are costal cruisers. Since I've never really used it for off shore I cannot tell you anything about that.

Thanks guys for a great app.


Sakhalin, LLC
27.9 MB
Requires iOS 10.0 or later. Compatible with iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPhone XS, iPhone XS Max, iPhone XR, iPad Air, iPad Air Wi-Fi + Cellular, iPad mini 2, iPad mini 2 Wi-Fi + Cellular, iPad Air 2, iPad Air 2 Wi-Fi + Cellular, iPad mini 3, iPad mini 3 Wi-Fi + Cellular, iPad mini 4, iPad mini 4 Wi-Fi + Cellular, 12.9-inch iPad Pro, 12.9-inch iPad Pro Wi-Fi + Cellular, 9.7-inch iPad Pro, 9.7-inch iPad Pro Wi-Fi + Cellular, iPad (5th generation), iPad Wi-Fi + Cellular (5th generation), 12.9-inch iPad Pro (2nd generation), 12.9-inch iPad Pro Wi‑Fi + Cellular (2nd generation), 10.5-inch iPad Pro, 10.5-inch iPad Pro Wi‑Fi + Cellular, iPad (6th generation), iPad Wi-Fi + Cellular (6th generation), iPad Pro (11-inch), iPad Pro (11-inch), iPad Pro (12.9-inch) (3rd generation), iPad Pro (12.9-inch) (3rd generation), and iPod touch.
Age Rating
Rated 4+
This app may use your location even when it isn't open, which can decrease battery life.
© 2018 Sakhalin LLC
In-App Purchases
  1. Upgrade for Premium Features $4.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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