IALA Navigation Marks vs MARPOL
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
IALA Navigation Marks
A quick reference guide for sailors and students to identify maritime navigation marks according to the IALA system. It covers buoy shapes, colors, topmarks, and light rhythms for various mark types, aiding in exam preparation and on-water identification.
- Identify lateral, cardinal, and special marks
- Covers buoy shape, color, topmark, and light rhythm
- Includes day and night views
- Practical study aid for seamanship training
- Quick lookup on iPhone and iPad
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Navigation Marks is a compact reference for skippers, sailors and students learning the IALA Maritime Buoyage System. Quickly identify lateral marks for Regions A and B, cardinal marks, isolated danger marks, safe water marks, special marks and new danger marks. Each entry shows the buoy shape, colour scheme, topmark and light rhythm so you can revise recognition rules before a course, exam or time on the water. Why it helps: - Covers the main IALA buoyage marks in one place - Includes day and night views where available - Explains colours, shapes, topmarks and light characteristics - Works as a practical study aid for RYA, IYT and general seamanship training - Built for quick lookup on iPhone and iPad Use Navigation Marks as a pocket study guide when preparing for boating exams, refreshing buoyage rules or checking how a mark should be identified. Questions or suggestions: support@appsforeach.com
MARPOL
This interactive course covers the MARPOL Convention, including all annexes with detailed visuals. Engage with varied tests to master the material and aim for captain-level knowledge.
- Interactive MARPOL Convention course
- All MARPOL Annexes included
- Detailed images
- Varied tests and tasks
- Progress tracking to captain level
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Interactive course of the MARPOL Convention. All Annexes of MARPOL with detailed images. Lots of interesting and varied tests. Try to complete all the tasks and become a captain.
Screenshots
Verdict
The clearest difference is review sentiment: IALA Navigation Marks at 50% against MARPOL's 0%. IALA Navigation Marks also leads on device support (4 vs 2) and iOS requirement (15.6 vs 17.5). MARPOL's advantage is update cadence (every 2 months vs every 23 months). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
IALA Navigation Marks costs $1.99 and MARPOL $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
IALA Navigation Marks ships an update every 23 months, MARPOL every 2 months. Both last shipped on September 10, 2026.
| Parameter | IALA Navigation Marks | MARPOL |
|---|---|---|
| Price | $1.99 | $1.99 |
| Positive reviews | 50.0% of reviews — better | 0.0% of reviews |
| Update frequency | Every 23 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.5 |
| Further details — not scored | ||
| Size | 28 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | Smirnov Yury | OLEKSANDR IZERGIN |
Customer experience
IALA Navigation Marks
MARPOL
In-app purchases
IALA Navigation Marks
No in-app purchases
MARPOL
No in-app purchases
Questions
Is IALA Navigation Marks free?
Is MARPOL free?
Do IALA Navigation Marks or MARPOL have ads?
Which is updated more often, IALA Navigation Marks or MARPOL?
Other comparisons
