# CES Trainer vs Power System Lab

The clearest difference is rating: CES Trainer at 5.0 against Power System Lab's 4.0. Power System Lab's advantage is in-app purchases (none vs 1) and update cadence (every 3 days vs every 11 months). 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. Power System Lab asks for nothing beyond the download.

CES Trainer holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

CES Trainer ships an update every 11 months, Power System Lab every 3 days. The most recent releases landed on October 27, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | CES Trainer | Power System Lab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ces-trainer-seafarer-test/id6737857414/reviews)** | [4.0 (3 ratings)](https://appshunter.io/ios/app/power-system-lab/id6814270423/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 3 days** |
| Monetization | **Free** | Subscription |
| Size | 62 MB | 256 MB |
| Requires iOS | 17.4 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 12+ | 12+ |
| Developer | [Yevgenii Kryzhanivskyi](https://appshunter.io/developer/1778319692) | [Serhii Zai](https://appshunter.io/developer/6814270425) |

## What reviewers say

### CES Trainer

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

Prepare for the CES seafarer test with practice questions and instant feedback. Study all questions with answers, track your readiness score, and review mistakes. Works offline with a clean design and dark mode.

**Highlights:** Practice CES-format questions, Offline access to all questions, Training and exam modes, Readiness score tracking, Review mistakes and save favorites, Searchable question bank

**Features:** macOS Compatibility

**In-app purchases (1)**

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


### Power System Lab

[App page](https://appshunter.io/ios/app/power-system-lab/id6814270423)

This app offers a comprehensive learning experience for marine electrical systems through interactive simulations, practical tools, and engaging games. It allows users to explore virtual environments, perform diagnostics, and test their knowledge with various challenges. The app also includes useful calculation tools and customization options.

**Highlights:** Interactive marine electrical simulations, Virtual instruments and diagnostic tools, Four educational games, Electrical calculation tools, Customizable learning environment, Progress tracking and account sync

**In-app purchases:** none


## Frequently asked questions

### Is CES Trainer free?

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

### Is Power System Lab free?

Power System Lab is free to download, with no in-app purchases.

### Which has better reviews, CES Trainer or Power System Lab?

CES Trainer is rated higher. CES Trainer averages 5.0 out of 5 from 1 ratings, while Power System Lab averages 4.0 from 3 ratings.

### Do CES Trainer or Power System Lab have ads?

Neither CES Trainer nor Power System Lab shows ads.

### Which is updated more often, CES Trainer or Power System Lab?

CES Trainer ships an update every 11 months, and Power System Lab every 3 days. Most recently, CES Trainer was updated on October 27, 2026 and Power System Lab on October 29, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*