# COLREG vs CVoyager

The clearest difference is review sentiment: CVoyager at 89% against COLREG's 0%. CVoyager also leads on price (Free vs $0.99) and update cadence (weekly vs every 7 months). COLREG's advantage is in-app purchases (none vs 4) and iOS requirement (12.0 vs 17.6). On ads and device support there is nothing between them.

CVoyager is free to download; COLREG costs $0.99 up front. CVoyager sells 4 in-app purchases, starting at $0.99 per month. COLREG asks for nothing beyond the download.

COLREG ships an update every 7 months, CVoyager weekly. The most recent releases landed on September 15, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | COLREG | CVoyager |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[3.5 (6 ratings)](https://appshunter.io/ios/app/cvoyager/id6502268141/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | 0.0% of reviews | **88.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Weekly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 133 MB | 77 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Oleksandr Kuzmychov](https://appshunter.io/developer/1623095994) | [Vladyslav Yarmak](https://appshunter.io/developer/1456545549) |

## What reviewers say

### 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


### CVoyager

[App page](https://appshunter.io/ios/app/cvoyager/id6502268141)

This maritime navigation tool uses advanced algorithms to plot efficient and safe sea routes. It offers ETA calculations, a global port database, and customizable preferences for vessel types and cargo. Designed for maritime professionals, it aims to reduce voyage times and improve fuel efficiency.

**Highlights:** Optimized route planning, Precise ETA calculation, A* pathfinding algorithm, Global port database, Customizable routing preferences, Save and export routes

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Navigational Warnings Monthly | $0.99 | per month |
| NAVAREA Warnings 6-Month | $3.99 | per 6 months |
| All Port Data | $9.99 | one-time |
| CVoyager - All Ports | $12.99 | one-time |


## Frequently asked questions

### Is COLREG free?

COLREG costs $0.99, with no in-app purchases.

### Is CVoyager free?

CVoyager is free to download, with in-app purchases available.

### Do COLREG or CVoyager have ads?

Neither COLREG nor CVoyager shows ads.

### Which is updated more often, COLREG or CVoyager?

COLREG ships an update every 7 months, and CVoyager weekly. Most recently, COLREG was updated on September 15, 2026 and CVoyager on September 23, 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.*