# SeaNav NP vs COLREG

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.

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.

Both ship on a similar rhythm, roughly every 7 months. The most recent releases landed on October 15, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | SeaNav NP | COLREG |
| --- | --- | --- |
| Price | $27.99 | **$0.99** |
| Rating | **[2.8 (4 ratings)](https://appshunter.io/ios/app/seanav-np/id1209754367/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | Every 7 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 63 MB | 133 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pocket Mariner Ltd.](https://appshunter.io/developer/719592131) | [Oleksandr Kuzmychov](https://appshunter.io/developer/1623095994) |

## What reviewers say

### SeaNav NP

[App page](https://appshunter.io/ios/app/seanav-np/id1209754367)

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:** macOS Compatibility, Apple Watch app

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Wind and Waves | $5.49 | per year |
| Pro Features | $14.49 | per year |
| New Zealand Charts | $16.99 | per year |
| Portuguese Charts | $19.99 | per year |
| US & Great Lakes | $24.99 | per year |
| Norwegian Charts | $24.99 | per year |
| UK & IE Charts | $25.99 | per year |
| Spanish Charts | $26.99 | per year |
| French Charts (N & W) | $29.99 | per year |
| Canadian Charts | $30.99 | per year |


### COLREG

[App page](https://appshunter.io/ios/app/colreg/id6446209111)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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 October 15, 2026 and COLREG on October 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*