# Maritime Knowledge vs OpenedDoor Exam

The clearest difference is update cadence: OpenedDoor Exam at weekly against Maritime Knowledge's monthly. Maritime Knowledge's advantage is iOS requirement (12.0 vs 14.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Maritime Knowledge ships an update monthly, OpenedDoor Exam weekly. The most recent releases landed on October 11, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Maritime Knowledge | OpenedDoor Exam |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Free | — |
| Size | 40 MB | 21 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MTECH COMMERCE AND BUSINESS SOLUTIONS PRIVATE LIMITED](https://appshunter.io/developer/1141333645) | [YAMMOBOTS COMPANY LIMITED](https://appshunter.io/developer/1461729686) |

## What reviewers say

### Maritime Knowledge

[App page](https://appshunter.io/ios/app/maritime-knowledge/id1488568770)

This application offers comprehensive marine education resources, including structured study materials and video lectures from experienced professors. It aims to provide accessible, quality learning for marine students worldwide, saving them time and energy.

**Highlights:** Online study materials, Video lectures, Structured curriculum, Experienced professors, Accessible worldwide, Student-friendly interface

**Features:** macOS Compatibility

**In-app purchases:** none


### OpenedDoor Exam

[App page](https://appshunter.io/ios/app/openeddoor-exam/id6747573824)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Maritime Knowledge free?

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

### Is OpenedDoor Exam free?

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

### Do Maritime Knowledge or OpenedDoor Exam have ads?

Neither Maritime Knowledge nor OpenedDoor Exam shows ads.

### Which is updated more often, Maritime Knowledge or OpenedDoor Exam?

Maritime Knowledge ships an update monthly, and OpenedDoor Exam weekly. Most recently, Maritime Knowledge was updated on October 11, 2026 and OpenedDoor Exam on October 13, 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.*