# ГМССБ Конвенция плюс. cMate vs Дельта

The clearest difference is price: Дельта at $1.99 against ГМССБ Конвенция плюс. cMate's $7.99. ГМССБ Конвенция плюс. cMate's advantage is review sentiment (21% vs 0%) and iOS requirement (10.0 vs 13.0). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

ГМССБ Конвенция плюс. cMate costs $7.99 and Дельта $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ГМССБ Конвенция плюс. cMate ships an update every 10 months, Дельта every 9 months. The most recent releases landed on October 7, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | ГМССБ Конвенция плюс. cMate | Дельта |
| --- | --- | --- |
| Price | $7.99 | **$1.99** |
| Positive reviews | **21.4% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 9 months** |
| Monetization | Paid | Paid |
| Size | 29 MB | 14 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Maxim Lukyanenko](https://appshunter.io/developer/1496252741) | [Andrey Andreyev](https://appshunter.io/developer/1418253369) |

## What reviewers say

### ГМССБ Конвенция плюс. cMate

[App page](https://appshunter.io/ios/app/cmate/id1500496463)

Prepare for GMDSS radio operator exams with a comprehensive question and answer database. Includes training tests and a search function for easy navigation. Covers various GMDSS systems and national requirements.

**Highlights:** GMDSS exam question and answer database, Training test functionality, Customizable test settings, Searchable question bank, Covers various GMDSS topics, Includes national Russian Federation requirements

**Features:** macOS Compatibility

**In-app purchases:** none


### Дельта

[App page](https://appshunter.io/ios/app/ecdis-2026/id6470127885)

Prepare for your ECDIS exam with this comprehensive question and answer simulator. It covers key topics including ECDIS functionality for inspections, equipment and integration, navigation, and electronic nautical charts. Master the material to ensure exam success.

**Highlights:** ECDIS functionality for inspections, ECDIS equipment and integration, ECDIS navigation, Electronic nautical charts, Question and answer format

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ГМССБ Конвенция плюс. cMate free?

ГМССБ Конвенция плюс. cMate costs $7.99, with no in-app purchases.

### Is Дельта free?

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

### Do ГМССБ Конвенция плюс. cMate or Дельта have ads?

Neither ГМССБ Конвенция плюс. cMate nor Дельта shows ads.

### Which is updated more often, ГМССБ Конвенция плюс. cMate or Дельта?

ГМССБ Конвенция плюс. cMate ships an update every 10 months, and Дельта every 9 months. Most recently, ГМССБ Конвенция плюс. cMate was updated on October 7, 2026 and Дельта on September 24, 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.*