# CA'Sim vs USCG Navigation Rules Handbook

The clearest difference is update cadence: CA'Sim at every 6 days against USCG Navigation Rules Handbook's every 3 weeks. USCG Navigation Rules Handbook's advantage is iOS requirement (15.1 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. CA'Sim sells 4 in-app purchases, starting at $0.99 per month and USCG Navigation Rules Handbook sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

CA'Sim ships an update every 6 days, USCG Navigation Rules Handbook every 3 weeks. The most recent releases landed on October 25, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | CA'Sim | USCG Navigation Rules Handbook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 3 weeks |
| Size | 6 MB | 84 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jatuphol Jaturapat](https://appshunter.io/developer/1788860463) | [SEDX LLC](https://appshunter.io/developer/6776048808) |

## What reviewers say

### CA'Sim

[App page](https://appshunter.io/ios/app/casim/id6758004211)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Features. (1 Month) | $0.99 | per month |
| Unlock All Features. (3 Months) | $2.99 | per 3 months |
| Unlock All Features. (1 Year) | $7.99 | per year |
| Lifetime Access | $17.99 | one-time |


### USCG Navigation Rules Handbook

[App page](https://appshunter.io/ios/app/uscg-navigation-rules-handbook/id6776329571)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coxswain Pro | $0.99 | one-time |


## Frequently asked questions

### Is CA'Sim free?

CA'Sim is free to download, with in-app purchases available.

### Is USCG Navigation Rules Handbook free?

USCG Navigation Rules Handbook is free to download, with in-app purchases available.

### Do CA'Sim or USCG Navigation Rules Handbook have ads?

Neither CA'Sim nor USCG Navigation Rules Handbook shows ads.

### Which is updated more often, CA'Sim or USCG Navigation Rules Handbook?

CA'Sim ships an update every 6 days, and USCG Navigation Rules Handbook every 3 weeks. Most recently, CA'Sim was updated on October 25, 2026 and USCG Navigation Rules Handbook on October 13, 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.*