# iStreams North Sea (E) vs COLREG

The clearest difference is price: iStreams North Sea (E) at Free against COLREG's $0.99. iStreams North Sea (E) also leads on update cadence (every 2 months vs every 7 months). COLREG's advantage is in-app purchases (none vs 6) and iOS requirement (12.0 vs 18.4). On ads and device support there is nothing between them.

iStreams North Sea (E) is free to download; COLREG costs $0.99 up front. iStreams North Sea (E) sells 5 one-off in-app purchases. COLREG asks for nothing beyond the download.

iStreams North Sea (E) ships an update every 2 months, COLREG every 7 months. The most recent releases landed on October 16, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | iStreams North Sea (E) | COLREG |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 7 months |
| Monetization | — | Paid |
| Size | 40 MB | 133 MB |
| Requires iOS | 18.4 | **12.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Navtech Software](https://appshunter.io/developer/355517263) | [Oleksandr Kuzmychov](https://appshunter.io/developer/1623095994) |

## What reviewers say

### iStreams North Sea (E)

[App page](https://appshunter.io/ios/app/istreams-north-sea-e/id1454493881)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Set tool | $1.99 | one-time |
| 1 Month Subscription | $2.99 | one-time |
| 6 Month subscription | $2.99 | one-time |
| Unlock CTS tool | $3.99 | one-time |
| 1 Year subscription | $5.99 | one-time |


### 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 iStreams North Sea (E) free?

iStreams North Sea (E) is free to download, with in-app purchases available.

### Is COLREG free?

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

### Do iStreams North Sea (E) or COLREG have ads?

Neither iStreams North Sea (E) nor COLREG shows ads.

### Which is updated more often, iStreams North Sea (E) or COLREG?

iStreams North Sea (E) ships an update every 2 months, and COLREG every 7 months. Most recently, iStreams North Sea (E) was updated on October 16, 2026 and COLREG on October 27, 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.*