# CES Test vs Power System Lab

The clearest difference is review sentiment: Power System Lab at 67% against CES Test's 17%. Power System Lab also leads on price (Free vs $5.99) and in-app purchases (none vs 1). CES Test's advantage is rating (5.0 vs 4.0) and iOS requirement (13.0 vs 17.0). On ads and device support there is nothing between them.

Power System Lab is free to download; CES Test costs $5.99 up front. CES Test sells 1 one-off in-app purchase. Power System Lab asks for nothing beyond the download.

CES Test holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews complicate that: 17% of CES Test's written reviews are positive against 67% of Power System Lab's, so the app with the better star average is not the one people write more warmly about.

CES Test ships an update every 2 months, Power System Lab every 3 days. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | CES Test | Power System Lab |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ces-test-seagull-training/id6468171620/reviews)** | [4.0 (3 ratings)](https://appshunter.io/ios/app/power-system-lab/id6814270423/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | 16.7% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | **Paid** | Subscription |
| Size | 65 MB | 256 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Andrey Andreyev](https://appshunter.io/developer/1418253369) | [Serhii Zai](https://appshunter.io/developer/6814270425) |

## What reviewers say

### CES Test

[App page](https://appshunter.io/ios/app/ces-test-seagull-training/id6468171620)

Prepare for marine certification exams with a comprehensive collection of Crew Evaluation System tests and answers. Features include preparation, exam, and marathon modes, plus a question search function.

**Highlights:** CES test preparation, Exam mode, Marathon mode, Question search, Engine tests, Deck tests, Detailed tests

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ces test questions and answers | $6.99 | 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 Test free?

CES Test costs $5.99, and also offers in-app purchases.

### Is Power System Lab free?

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

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

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

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

Neither CES Test nor Power System Lab shows ads.

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

CES Test ships an update every 2 months, and Power System Lab every 3 days. Most recently, CES Test was updated on October 24, 2026 and Power System Lab on October 17, 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.*