# Marinus vs KREDO

The clearest difference is review sentiment: Marinus at 65% against KREDO's 0%. Marinus also leads on ratings volume (215 vs 3) and iOS requirement (13.0 vs 15.6). KREDO's advantage is rating (5.0 vs 4.4) and in-app purchases (none vs 1). 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. KREDO asks for nothing beyond the download.

KREDO holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Marinus has 215 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 65% of Marinus's written reviews are positive against 0% of KREDO's, so the app with the better star average is not the one people write more warmly about.

Marinus ships an update every 5 weeks, KREDO weekly. Both last shipped on October 24, 2026.

## The numbers

| Metric | Marinus | KREDO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (215 ratings)](https://appshunter.io/ios/app/marinus-maritime-rules/id536108872/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/kredo/id1487637220/reviews)** |
| Number of ratings | **215** | 3 |
| Positive reviews | **65.3% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 113 MB | 103 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Alejandro](https://appshunter.io/developer/476976572) | [Tesseract Learning Inc.](https://appshunter.io/developer/1487637219) |

## 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


### KREDO

[App page](https://appshunter.io/ios/app/kredo/id1487637220)

Easily create and distribute short learning modules in minutes. This platform allows for seamless course publishing and rollout, empowering users to build educational content quickly and efficiently.

**Highlights:** Create microlearning courses, Publish courses seamlessly, Roll-out courses quickly, Intuitive dashboard, Resource exploration

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

**In-app purchases:** none


## Frequently asked questions

### Is Marinus free?

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

### Is KREDO free?

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

### Which has better reviews, Marinus or KREDO?

KREDO is rated higher. Marinus averages 4.4 out of 5 from 215 ratings, while KREDO averages 5.0 from 3 ratings.

### Do Marinus or KREDO have ads?

Marinus shows ads; KREDO does not.

### Which is updated more often, Marinus or KREDO?

Marinus ships an update every 5 weeks, and KREDO weekly. Most recently, Marinus was updated on October 24, 2026 and KREDO on October 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.*