# ICS vs Neptune

The clearest difference is price: Neptune at Free against ICS's $2.99. Neptune also leads on update cadence (every 4 days vs every 9 months) and device support (3 vs 1). On ads and in-app purchases there is nothing between them.

Neptune is free to download; ICS costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ICS ships an update every 9 months, Neptune every 4 days. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | ICS | Neptune |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[5.0 (17 ratings)](https://appshunter.io/ios/app/neptune-navigation-rules/id6756641315/reviews)** |
| Number of ratings | — | **17** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 4 days** |
| Monetization | — | Free |
| Size | 3 MB | 96 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Smirnov Yury](https://appshunter.io/developer/420438416) | [Brice Brown](https://appshunter.io/developer/1555846025) |

## What reviewers say

### ICS

[App page](https://appshunter.io/ios/app/ics-signal-flags-and-morse-code/id6745889978)

**Features:** macOS Compatibility

**In-app purchases:** none


### Neptune

[App page](https://appshunter.io/ios/app/neptune-navigation-rules/id6756641315)

Prepare for USCG COLREG and OOD exams with a comprehensive study system. Features AI tutoring, interactive 3D visuals for lights and shapes, and a complete question bank with intelligent test modes and progress tracking.

**Highlights:** AI-powered tutor for rule explanations, Interactive 3D lights and shapes trainer, Official USCG question bank, Verbatim memory trainer, Intelligent exam simulator modes, Advanced progress tracking, Offline study capability

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ICS free?

ICS costs $2.99, with no in-app purchases.

### Is Neptune free?

Neptune is free to download, with no in-app purchases.

### Do ICS or Neptune have ads?

Neither ICS nor Neptune shows ads.

### Which is updated more often, ICS or Neptune?

ICS ships an update every 9 months, and Neptune every 4 days. Most recently, ICS was updated on November 8, 2026 and Neptune on November 5, 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.*