Comparison

SeaNav NP vs COLREG

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

Head to head
About

SeaNav NP

This app offers real-time maritime navigation with high-resolution digital charts and powerful route planning. It includes free navigation tools, offline chart support, and weather information. Advanced features like live AIS and augmented reality views are available via in-app purchases.

Highlights
  • Real-time navigation
  • High-resolution digital charts
  • Route planning and tracking
  • Offline chart support
  • Live AIS and AR views (IAP)
  • Weather, tide, and sun/moon times
  • Apple Watch app
Features
Read full description

Explore, Plan and Navigate in real time and outstanding high-resolution with the latest Digital Vector Marine charts and powerful route planning and navigation tools. Our free version includes all our navigation and trip planning tools. High resolution vector charts derived from official NOAA and UKHO ENC chart data (including US,CA,UK,IE,NL,BE,DE,FI,NZ) and live AIS and Augmented Reality views (AR) are available by In App Purchase (IAP). Each chart purchase provides free updates for a 12 month period. Free features:- - Instruments - Normal, satellite and hybrid view maps - Route Planning and real-time tracking - North up and course up displays - Charts work offline - Route export, import and sharing - Share routes via Dropbox - Built-in tutorial mode including demo charts. - NMEA GPS, AIS, Wind Speed and Direction gauges - Tide, moon and sun times - Weather including wave height and period - Apple Watch App - Favourite Places Additional features available via In App Purchases (auto-renewing subscriptions):- - Marine Vector charts - all buoys, lights etc. are tappable - Live AIS Ship positions - Live Augmented Reality camera view plus support for the FLIR ONE Infra-red camera. - Air Draft: Check your boat's clearance under bridges and cables - Real time local wind feed and 7 day forecast (IAP) Our unique AR view mode allows you to view buoys, lights, ships, waypoints and track overlaid on your iPhone or iPad live camera view. With "AR LockOn" you can select a target on the chart and then be guided to it in the AR camera view. See ships and MOBs at night and in the fog too with our world leading AR FLIR ONE camera support. The app’s HUD shows your position on route, Course (COG), Speed(SOG), Vector Made Good (VMG), Estimated Time of Arrival (ETA), Distance and bearing to next Waypoint. Waypoint reached alerts, auto-routing to the next waypoint and flashing AIS collision alerts. All our in-app purchases are 1 year subscriptions, which automatically renew at the end of the subscription period unless auto-renew is turned off at least 24-hours before the end of the current period. Payment will be charged to your iTunes Account at confirmation of purchase, and will be charged for renewal within 24-hours prior to the end of the current period. Subscriptions may be managed by the iTunes account holder and auto-renewal may be turned off by going to Account Settings after purchase. 
No cancellation of the current subscription is allowed during active subscription period. Our privacy policy and terms and conditions may be viewed here:- Terms of Use: http://seanav.net/termsofuse.php Privacy Policy: http://seanav.net/privacy.php Support: help@pocketmariner.com Requirements: iPhone or iPad. GPS only required for real time route navigation. Optional Real time AIS, Tides and Weather information require an active internet connection. Real-time route navigation requires a GPS location. iPhone devices and iPads with a cellular modem already have a built-in GPS, even if they do not have an active service plan. If you have a WiFi-only iPad or iPod you will need an external GPS receiver to enable navigation. Inexpensive 3rd Party units are available to add these accurate location capabilities to your device via bluetooth. Please note that continued use of GPS running in the background can dramatically decrease battery life. Third Party Licenses and Notices NOTICE: US Marine Charts are derived from official NOAA Electronic Navigational Charts. “THIS PRODUCT IS NOT TO BE USED FOR NAVIGATION” The use of this product for the planning and execution of passages will not meet the requirements of SOLAS “NOTICE: Instituto Hidrográfico de la Marina (IHM) and the UK Hydrographic Office (UKHO) make no warranties or representations, express or implied, with respect to this product. The Instituto Hidrográfico de la Marina (IHM) and the UKHO have not verified the information within this product or quality assured it.”

About

COLREG

Master maritime navigation with this comprehensive guide to the International Regulations for Preventing Collisions at Sea. Learn about ship lights, day shapes, sound signals, and access the full COLREGs for safe sailing.

Highlights
  • Ship lights guide
  • Day shapes meanings
  • Sound signals library
  • Complete COLREGs access
  • Flashcards for study
Features
Read full description

Introducing the Ultimate COLREG App - Your All-in-One Guide to Safe Navigation! Set sail with confidence and master the rules of the sea like never before with our comprehensive COLREG App, now available on the App Store. Whether you're a seasoned mariner or a maritime enthusiast, this app is your essential companion for understanding and applying the International Regulations for Preventing Collisions at Sea (COLREGs). • Ship Lights: Navigate the darkness with ease! Our app provides a detailed guide to ship lights, helping you identify vessels and their activities based on their unique light configurations. • Daily Shapes: Decode maritime signals effortlessly! Learn about the various day shapes and their meanings, ensuring you're always prepared to interpret the intentions of other vessels. • Sound Signals: Understand the language of the sea! Explore a comprehensive library of sound signals, so you can effectively communicate with other vessels and enhance safety on the water. • Rules: Dive deep into the COLREGs! Access the complete set of regulations, organized for easy reference, to ensure you're always aware of your rights and responsibilities at sea. • Flash Cards: Study on the go! Our flashcards make learning COLREGs a breeze. Test your knowledge and reinforce your understanding wherever you are. Master the art of safe navigation and enjoy peace of mind on the open water with our COLREG App. It's the ideal companion for both novice and experienced sailors, helping you stay compliant and avoid collisions. Don't leave your safety to chance – download our COLREG App today and gain the knowledge you need to sail with confidence. Make the smart choice for safe navigation and get started now! Smooth sailing is just a download away. Get our COLREG App from the App Store today and embark on a journey to safer, smarter, and more enjoyable boating experiences.

Screenshots

SeaNav NP4 screens
COLREG4 screens

Verdict

The call

The clearest difference is price: COLREG at $0.99 against SeaNav NP's $27.99. COLREG also leads on in-app purchases (none vs 10). SeaNav NP's advantage is device support (4 vs 2). On update cadence, ads and iOS requirement 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

SeaNav NP costs $27.99 and COLREG $0.99 up front. SeaNav NP sells 10 in-app purchases, starting at $5.49 per year. COLREG asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 7 months. The most recent releases landed on September 29, 2026 and October 3, 2026 respectively.

Scorecard4 real differences · 6 level
SeaNav NP versus COLREG: the parameters behind the verdict, then further details
ParameterSeaNav NPCOLREG
Price$27.99$0.99 — better
Rating2.8 (4 ratings) — better—
Positive reviews—0.0% of reviews
Number of ratings4 — better—
Update frequencyEvery 7 monthsEvery 7 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPod
Requires iOS11.0 — better12.0
Further details — not scored
Size63 MB133 MB
Age rating4+4+
DeveloperPocket Mariner Ltd.Oleksandr Kuzmychov

Customer experience

SeaNav NP

All ratings4 ratings
Positive25.0%
Neutral50.0%
Negative25.0%

COLREG

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

10 purchases

SeaNav NP

Subscriptions10
  • Wind and Waves$5.491 Year
  • Pro Features$14.491 Year
  • New Zealand Charts$16.991 Year
Show 7 more
  • Portuguese Charts$19.991 Year
  • US & Great Lakes$24.991 Year
  • Norwegian Charts1 Month trial$24.991 Year
  • UK & IE Charts$25.991 Year
  • Spanish Charts$26.991 Year
  • French Charts (N & W)$29.991 Year
  • Canadian Charts$30.991 Year
None

COLREG

No in-app purchases

Questions

Is SeaNav NP free?
SeaNav NP costs $27.99, and also offers in-app purchases.
Is COLREG free?
COLREG costs $0.99, with no in-app purchases.
Do SeaNav NP or COLREG have ads?
Neither SeaNav NP nor COLREG shows ads.
Which is updated more often, SeaNav NP or COLREG?
SeaNav NP ships an update every 7 months, and COLREG every 7 months. Most recently, SeaNav NP was updated on September 29, 2026 and COLREG on October 3, 2026.

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