IMO Signs vs MARPOL
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
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: IMO Signs at 100% against MARPOL's 0%. MARPOL's advantage is update cadence (every 2 months vs every 95 months) and price ($1.99 vs $3.99). On ads, in-app purchases, monetization model and device support 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
IMO Signs costs $3.99 and MARPOL $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
IMO Signs ships an update every 95 months, MARPOL every 2 months. The most recent releases landed on September 21, 2026 and September 10, 2026 respectively.
| Parameter | IMO Signs | MARPOL |
|---|---|---|
| Price | $3.99 | $1.99 — better |
| Positive reviews | 100.0% of reviews — better | 0.0% of reviews |
| Update frequency | Every 95 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 17.5 — better |
| Further details — not scored | ||
| Size | 194 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | Sergejs Zeigurs | OLEKSANDR IZERGIN |
Customer experience
IMO Signs
MARPOL
In-app purchases
IMO Signs
No in-app purchases
MARPOL
No in-app purchases
