# Дельта vs cMate Apps Конвенция плюс

The clearest difference is price: cMate Apps Конвенция плюс at Free against Дельта's $3.99. cMate Apps Конвенция плюс also leads on review sentiment (22% vs 0%). Дельта's advantage is update cadence (every 4 months vs every 12 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

cMate Apps Конвенция плюс is free to download; Дельта costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Дельта ships an update every 4 months, cMate Apps Конвенция плюс every 12 months. The most recent releases landed on August 30, 2026 and August 31, 2026 respectively.

## The numbers

| Metric | Дельта | cMate Apps Конвенция плюс |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/2026/id1551858713/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | **22.2% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 12 months |
| Monetization | Paid | **Free** |
| Size | 78 MB | 14 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrey Andreyev](https://appshunter.io/developer/1418253369) | [Maxim Lukyanenko](https://appshunter.io/developer/1496252741) |

## What reviewers say

### Дельта

[App page](https://appshunter.io/ios/app/2026/id1551858713)

Prepare for maritime certification exams with this test simulator. It includes official questions and answers for qualified and watchkeeping sailors, covering safety, navigation, cargo operations, and environmental protection. Work offline and use the built-in search.

**Highlights:** Official exam questions and answers, Covers safety, navigation, and cargo, Offline functionality, Built-in search, Preparation for Convention Plus 3.0

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Дельта free?

Дельта costs $3.99, with no in-app purchases.

### Is cMate Apps Конвенция плюс free?

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

### Do Дельта or cMate Apps Конвенция плюс have ads?

Neither Дельта nor cMate Apps Конвенция плюс shows ads.

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

Дельта ships an update every 4 months, and cMate Apps Конвенция плюс every 12 months. Most recently, Дельта was updated on August 30, 2026 and cMate Apps Конвенция плюс on August 31, 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.*