# CES Trainer vs Master

The clearest difference is in-app purchases: Master at none against CES Trainer's 1. CES Trainer's advantage is update cadence (daily vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. CES Trainer sells 1 one-off in-app purchase. Master asks for nothing beyond the download.

CES Trainer ships an update daily, Master fortnightly. The most recent releases landed on September 10, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | CES Trainer | Master |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Daily** | Fortnightly |
| Monetization | — | Free |
| Size | 59 MB | 305 MB |
| Requires iOS | **17.4** | 17.6 |
| Devices | iPhone | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Yevgenii Kryzhanivskyi](https://appshunter.io/developer/1778319692) | [Peterjohn Chisholm](https://appshunter.io/developer/1602390398) |

## What reviewers say

### CES Trainer

[App page](https://appshunter.io/ios/app/ces-trainer/id6737857414)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy me a beer | $4.99 | one-time |


### Master

[App page](https://appshunter.io/ios/app/master-nav-colregs-iala-tests/id6758554000)

Practice maritime navigation rules and buoyage systems with this app. It helps you identify knowledge gaps and track your progress in mastering essential regulations for mariners.

**Highlights:** USCG Navigation Rules practice, IALA Maritime Buoyage System tests, Knowledge gap identification, Progress tracking, Developed by Master Mariner

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

**In-app purchases:** none


## Frequently asked questions

### Is CES Trainer free?

CES Trainer is free to download, with in-app purchases available.

### Is Master free?

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

### Do CES Trainer or Master have ads?

Neither CES Trainer nor Master shows ads.

### Which is updated more often, CES Trainer or Master?

CES Trainer ships an update daily, and Master fortnightly. Most recently, CES Trainer was updated on September 10, 2026 and Master on September 6, 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.*