# Marinus vs Maritime Trainer

The clearest difference is in-app purchases: Maritime Trainer at none against Marinus's 1. Maritime Trainer also leads on ads (none vs shown) and update cadence (fortnightly vs every 5 weeks). Marinus's advantage is iOS requirement (13.0 vs 15.5). On price and device support there is nothing between them.

Both are free to download. Marinus sells 1 in-app purchase, starting at $8.99 per year. Maritime Trainer asks for nothing beyond the download.

Marinus ships an update every 5 weeks, Maritime Trainer fortnightly. The most recent releases landed on November 1, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Marinus | Maritime Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (215 ratings)](https://appshunter.io/ios/app/marinus-maritime-rules/id536108872/reviews)** | — |
| Number of ratings | **215** | — |
| Positive reviews | 65.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 113 MB | 34 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Alejandro](https://appshunter.io/developer/476976572) | [MTR BILISIM EGITIM VE DANISMANLIK ANONIM SIRKETI](https://appshunter.io/developer/1180440944) |

## What reviewers say

### Marinus

[App page](https://appshunter.io/ios/app/marinus-maritime-rules/id536108872)

This app provides comprehensive guidance on maritime navigation rules and signals. It offers detailed information on flags, lights, sounds, and buoyage systems, along with interactive quizzes and a map feature. Designed for sailors, it ensures safe navigation on any vessel.

**Highlights:** Maritime flags and meanings, Weather scales and cloud identification, Sound signal guidance, Vessel navigation light diagrams, Day shape identification, Safe navigation maneuvers, Morse code decoder, IALA Buoyage System, Radio communication guidelines, COLREGs text

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Marinus PRO | $8.99 | per year |

**What reviewers like**

- 👍 Great app for learning
- 👍 Useful study aid
- 👍 Very helpful for mariners
- 👍 Good information provided
- 👍 Easy to use

**What reviewers complain about**

- 👎 Swamped with ads
- 👎 Broken app functionality
- 👎 Subscription model is a money grab
- 👎 Lifetime pro withdrawn
- 👎 Scam for changing to subscription

**Reported bugs**

- App not working, ads won't clear
- App crashes frequently
- Mistake with sounds
- App crashes after 10-15 seconds

**Requested features**

- Settings for Buoyage A & B & combined
- Search feature
- Combine sounds and lights
- Add tides information
- More free version functionality


### Maritime Trainer

[App page](https://appshunter.io/ios/app/maritime-trainer/id6469516767)

**In-app purchases:** none


## Frequently asked questions

### Is Marinus free?

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

### Is Maritime Trainer free?

Maritime Trainer is free to download, with no in-app purchases.

### Do Marinus or Maritime Trainer have ads?

Marinus shows ads; Maritime Trainer does not.

### Which is updated more often, Marinus or Maritime Trainer?

Marinus ships an update every 5 weeks, and Maritime Trainer fortnightly. Most recently, Marinus was updated on November 1, 2026 and Maritime Trainer on October 27, 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.*