# Master vs PSV. Support Deck. CES Test

The clearest difference is update cadence: Master at fortnightly against PSV. Support Deck. CES Test's every 39 months. Master also leads on price ($1.99 vs $5.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Master costs $1.99 and PSV. Support Deck. CES Test $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Master ships an update fortnightly, PSV. Support Deck. CES Test every 39 months. The most recent releases landed on October 22, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Master | PSV. Support Deck. CES Test |
| --- | --- | --- |
| Price | **$1.99** | $5.99 |
| 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 39 months |
| Monetization | Paid | — |
| Size | 117 MB | 35 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Peterjohn Chisholm](https://appshunter.io/developer/1602390398) | [Maxim Lukyanenko](https://appshunter.io/developer/1496252741) |

## What reviewers say

### Master

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

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


### PSV. Support Deck. CES Test

[App page](https://appshunter.io/ios/app/psv-support-deck-ces-test/id6455428851)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Master free?

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

### Is PSV. Support Deck. CES Test free?

PSV. Support Deck. CES Test costs $5.99, with no in-app purchases.

### Do Master or PSV. Support Deck. CES Test have ads?

Neither Master nor PSV. Support Deck. CES Test shows ads.

### Which is updated more often, Master or PSV. Support Deck. CES Test?

Master ships an update fortnightly, and PSV. Support Deck. CES Test every 39 months. Most recently, Master was updated on October 22, 2026 and PSV. Support Deck. CES Test on October 9, 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.*