# Master vs ICS

The clearest difference is update cadence: Master at fortnightly against ICS's every 9 months. Master also leads on chart position (#196 vs unranked) and price ($1.99 vs $2.99). On ads, in-app purchases and device support there is nothing between them.

Master costs $1.99 and ICS $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Master ships an update fortnightly, ICS every 9 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Master | ICS |
| --- | --- | --- |
| Price | **$1.99** | $2.99 |
| Rating | **[4.8 (100 ratings)](https://appshunter.io/ios/app/master-nav/id1602390396/reviews)** | — |
| Number of ratings | **100** | — |
| Positive reviews | 96.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 9 months |
| Monetization | Paid | — |
| Best chart rank | **#196** | — |
| Size | 117 MB | 3 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Peterjohn Chisholm](https://appshunter.io/developer/1602390398) | [Smirnov Yury](https://appshunter.io/developer/420438416) |

## What reviewers say

### Master

[App page](https://appshunter.io/ios/app/master-nav/id1602390396)

**Currently charting:** #196 Top Paid · Education (US App Store)

Learn maritime navigation rules with an interactive system designed for effective retention. This app breaks down complex regulations into manageable sections with visual aids and mnemonics. It revisits incorrect answers and provides instant graphical feedback, making the learning process intuitive and efficient.

**Highlights:** Interactive learning system, Step-by-step rule guidance, Mnemonics and memory aids, Interactive visuals, Graphical feedback on answers, Practice section with progress tracking

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

**In-app purchases:** none


### ICS

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Master free?

Master costs $1.99, with no in-app purchases.

### Is ICS free?

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

### Do Master or ICS have ads?

Neither Master nor ICS shows ads.

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

Master ships an update fortnightly, and ICS every 9 months. Most recently, Master was updated on October 25, 2026 and ICS on October 24, 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.*