# cMate Apps Конвенция плюс vs Power System Lab

The clearest difference is update cadence: Power System Lab at daily against cMate Apps Конвенция плюс's every 12 months. cMate Apps Конвенция плюс's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

cMate Apps Конвенция плюс ships an update every 12 months, Power System Lab daily. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | cMate Apps Конвенция плюс | Power System Lab |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 22.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Daily** |
| Monetization | Free | — |
| Size | 14 MB | 30 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Maxim Lukyanenko](https://appshunter.io/developer/1496252741) | [Serhii Zai](https://appshunter.io/developer/6814270425) |

## What reviewers say

### cMate Apps Конвенция плюс

[App page](https://appshunter.io/ios/app/cmate-apps/id6502718737)

This app consolidates all developer applications, focusing on maritime training and information for users, especially those in Russia. It offers preparation modules for various maritime roles and certifications, alongside informational tools for navigation and port data.

**Highlights:** Maritime certification preparation, Specialized training modules, Information on vessels and ports, IMO phrases and codes, Consolidated developer apps

**Features:** macOS Compatibility

**In-app purchases:** none


### Power System Lab

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

**In-app purchases:** none


## Frequently asked questions

### Is cMate Apps Конвенция плюс free?

cMate Apps Конвенция плюс is free to download, with no in-app purchases.

### Is Power System Lab free?

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

### Do cMate Apps Конвенция плюс or Power System Lab have ads?

Neither cMate Apps Конвенция плюс nor Power System Lab shows ads.

### Which is updated more often, cMate Apps Конвенция плюс or Power System Lab?

cMate Apps Конвенция плюс ships an update every 12 months, and Power System Lab daily. Most recently, cMate Apps Конвенция плюс was updated on October 7, 2026 and Power System Lab on October 1, 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.*