Comparison

IMO Signs vs MARPOL

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

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.

Highlights
  • Search by ID
  • Search by Name
  • Knowledge rechecking
  • Study aid
Features
Read full description

- Search view by ID - Search view by Name Good for study and recheck your knowledge. Hope you enjoy! :) Thanks

About

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.

Highlights
  • Interactive MARPOL Convention course
  • All MARPOL Annexes included
  • Detailed images
  • Varied tests and tasks
  • Progress tracking to captain level
Features
Read full description

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

IMO Signs4 screens
MARPOL4 screens

Verdict

The call

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 ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

IMO Signs costs $3.99 and MARPOL $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard3 real differences ยท 5 level
IMO Signs versus MARPOL: the parameters behind the verdict, then further details
ParameterIMO SignsMARPOL
Price$3.99$1.99 โ€” better
Positive reviews100.0% of reviews โ€” better0.0% of reviews
Update frequencyEvery 95 monthsEvery 2 months โ€” better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.617.5 โ€” better
Further details โ€” not scored
Size194 MB36 MB
Age rating4+4+
DeveloperSergejs ZeigursOLEKSANDR IZERGIN

Customer experience

IMO Signs

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

MARPOL

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

IMO Signs

No in-app purchases

None

MARPOL

No in-app purchases

Questions

Is IMO Signs free?
IMO Signs costs $3.99, with no in-app purchases.
Is MARPOL free?
MARPOL costs $1.99, with no in-app purchases.
Do IMO Signs or MARPOL have ads?
Neither IMO Signs nor MARPOL shows ads.
Which is updated more often, IMO Signs or MARPOL?
IMO Signs ships an update every 95 months, and MARPOL every 2 months. Most recently, IMO Signs was updated on September 21, 2026 and MARPOL on September 10, 2026.

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