SEAiq

SEAiq

by Sakhalin

194 ratings
75 reviews
Free
In-App Purchases

Details

Released
June 1, 2012
Updated
October 30, 2026

Background Location Access

SEAiq screenshot #1 for iPhone
SEAiq screenshot #2 for iPhone
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About

This marine navigation app offers comprehensive charting tools, allowing users to load various chart formats and automatically download NOAA charts for the US. It includes features like waypoints, routes, tracks, weather overlays, and NMEA/AIS integration for enhanced seafaring.

βœ“Load custom charts (S-57, S-63, BSB, KAP)
βœ“Automatic NOAA chart downloads (US)
βœ“Waypoint and route planning
βœ“Track recording and display
βœ“Night color modes
βœ“Anchor alarm
βœ“Weather overlays (wind & isobar)
βœ“NMEA and AIS integration
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What users say about SEAiq

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What's New in SEAiq

5.8.0

October 30, 2026

* Minor improvements and fixes

2

Subscriptions & In-App Purchases

Premium Annual

Premium navigation features

$15.001 Year
How to cancel SEAiq subscription ⁉️

User reviews

Great for easy Sat image downloads

I have used SEAiq for over 5 years, primarily for navigating via Sat images. I love the AIS overlay as well. For charts I still rely on Navionics, but find sat images far more accurate when navigating tight coral reefs and avoiding bommies. The easy sat download relies on a subscription to VentureFarther. Unfortunately this has stopped working recently making the app unusable for my purposes. Hopefully SeaIQ can add another form of SAT downloading, maybe natively integrated.
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No Access!!!!!

I just paid for the premium and am still getting no access to the features offered!!

Loaded with great features

So many good features. Only down side is it is a little tedious to plot a course. I wish they would simplify that

Daily driver

I have logged over 10k offshore sailing miles on SEAiq and consider it an essential piece of equipment. I highly recommend it to boaters wanting a highly reliable navigation app, which boasts tons of features in a clean and sensical interface.

To start, it is incomparably more versatile than Navionics for plotting routes and waypoints, estimating AIS target crossing range, as well as visualizing vessel data. For the last bit I use a YDWR02 NMEA-Wifi router, which wirelessly transmits all vessel sensor output to SEAiq on my iPads (such as GPS, speed, wind, depth, etc.).

Features I especially appreciate include β€˜NMEA data smoothing’ (for an easier read on COG/AWS/SOG) and the ability to switch into β€˜dark mode’ (to preserve your night vision). The app allows you to modify all kinds of parameters, enable alarms (wind speed, depth, AIS, anchor, etc.) and check tides, to name a few.

Similar to OpenCPN, you can also load custom satellite charts (.kap files from GoogleEarth or VentureFarther) which are invaluable when navigating in places where vector charts are inaccurate (ie. Navionics in Fiji) and/or when anchoring around rocks/coral reefs.

You can also load vector charts from subscription-based services like ChartWorld or NZ ENC, although I did find it quite complicated to setup initially (β€˜certificates’ and β€˜user permits’ are required for each device). As a result, I often use SEAiq in tandem with Navionics while navigating in coastal waters, as the latter still offers great chart detail in most places. On the other hand, if you don’t plan on leaving US territorial waters, the NOAA charts in SEAiq are free and very easy to load.

Furthermore, all chart files and tracks are saved in an easily accessible folder, so you can backup, modify or share them across devices. I have never had any charts accidentally disappear, nor has the app ever crashed on me (unlike Navionics, which does so constantly).

Lastly, I am thankful to the developer, who was quick to answer any questions I have had thus far. The only request I would have is to add support for .MBTiles :) Thanks and keep up the good work! Highly recommend.
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My favorite for beyond harbor

We use SEAIQ and Navionics on a daily basis. Navionics primarily for new harbors in the US due to their sonar charts but we use SEAIQ whenever underway outside the harbor. There is room for improvement but likely features I am interested are geared towards weekend cruises whereas SEAIQ is focused on professionals. I still love it though.
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Developer apps

User experience

🐞

Reported Bugs

4 issues

No access to premium features after payment

Bug

Chart downloads fail if app is not on screen

Bug

App freezes when trying to delete

Bug

App crashes

Bug
✨

Requested Features

13 requests

Simplify course plotting

Feature

Add support for .MBTiles

Feature

Add VMG feature

Feature

Add support for .MBTiles

Feature

Add support for .MBTiles

Feature

Allow selection of discreet chart areas

Feature

Add GPS data from TCP/IP source

Feature

Allow disabling internal GPS

Feature

Provide good integration/complement to OpenCpn

Feature

Provide TCP/IP support for NMEA data

Feature

Broadcast waypoint and NMEA data to external systems

Feature

Lower price for waypoints creation

Feature

Allow using purchased charts across devices

Feature

FAQ

Does SEAiq have ads?

SEAiq is ad-free, allowing for an uninterrupted navigation experience. The app focuses on providing core navigation features without advertisements.

What devices does SEAiq support?

SEAiq is available on iPhone, iPad, and iPod. It is designed to work across Apple's mobile device ecosystem.

How often is SEAiq updated?

SEAiq was last updated on October 30, 2026, with version 5.8.0. This indicates a history of regular updates to improve functionality and compatibility.

What is the age rating for SEAiq?

SEAiq has an age rating of 4+, making it suitable for a wide range of users. This rating suggests content is generally appropriate for young children.

Can I use SEAiq offline?

Yes, SEAiq offers offline functionality, which is crucial for marine navigation where internet connectivity may be unreliable. Users can download charts and plan routes for use without a connection.

What is the cost of SEAiq?

SEAiq is free to download and use for basic chart viewing. Premium navigation features are available through a 7-day evaluation period, after which an annual subscription of $15.00 is required.

What do users like most about SEAiq?

User reviews highlight SEAiq's reliability, extensive features, clean interface, and versatility for plotting routes and waypoints. Many appreciate the professional-grade tools and the ability to use custom charts.

What are common user complaints about SEAiq?

Some users find the initial chart setup and route plotting to be tedious or complicated, with a steep learning curve. There have also been past issues with chart supplier compatibility and app speed.