IALA Navigation Marks vs IMO Signs
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
IMO Signs
This educational app allows users to search for symbols by ID or name. It's designed for studying and reinforcing knowledge in a specific subject area. Enjoy a straightforward learning experience.
- Search by ID
- Search by Name
- Knowledge rechecking
- Study aid
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- Search view by ID - Search view by Name Good for study and recheck your knowledge. Hope you enjoy! :) Thanks
Screenshots
Verdict
The clearest difference is review sentiment: IMO Signs at 100% against IALA Navigation Marks's 50%. IALA Navigation Marks's advantage is update cadence (every 23 months vs every 95 months) and price ($1.99 vs $3.99). On 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 IMO Signs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
IALA Navigation Marks ships an update every 23 months, IMO Signs every 95 months. The most recent releases landed on September 10, 2026 and September 21, 2026 respectively.
| Parameter | IALA Navigation Marks | IMO Signs |
|---|---|---|
| Price | $1.99 — better | $3.99 |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Update frequency | Every 23 months — better | Every 95 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.6 |
| Further details — not scored | ||
| Size | 28 MB | 194 MB |
| Age rating | 4+ | 4+ |
| Developer | Smirnov Yury | Sergejs Zeigurs |
Customer experience
IALA Navigation Marks
IMO Signs
In-app purchases
IALA Navigation Marks
No in-app purchases
IMO Signs
No in-app purchases
Questions
Is IALA Navigation Marks free?
Is IMO Signs free?
Do IALA Navigation Marks or IMO Signs have ads?
Which is updated more often, IALA Navigation Marks or IMO Signs?
Other comparisons
