Comparison

Seabook Maritime vs CES Trainer

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

Head to head
About

Seabook Maritime

This app provides essential maritime information for seafarers and shore-based professionals. It serves as an offline reference for ship stability, navigation, regulations, and marine engineering, aiding in safer seas and cleaner waters.

Highlights
  • COLREG regulations
  • GMDSS information
  • Marine engineering details
  • Navigation at sea
  • Ship stability calculations
  • Shipboard safety guidelines
Features
Read full description

Seabook serves as a key information source for seafarers and shore-based employees to promote safer seas and cleaner waters. This easy-to-use, accessible-offline mobile app serves as a reference tool for key elements of Ship stability, Navigation, COLREG and Marine engineering, and is designed for seafarers, cadets, maritime students and master mariners alike. Seabook contains details on; 1) COLREG (International Regulations for Preventing Collisions at Sea) 2) GMDSS (Global Maritime Distress and Safety System) 3) International Code of Signals 4) Marine Engineering 5) Marine Meteorology 6) Shipboard Safety 7) Health at Sea 8) Life Saving Appliances 9) Shipmanagement and Business 10) Navigation at Sea 11) Ship Stability 12) Country Flags 13) Ropework 14) Knots 15) more and more enriched contents ...

About

CES Trainer

Prepare for the CES seafarer test with practice questions and instant feedback. Study all questions with answers, track your readiness score, and review mistakes. Works offline with a clean design and dark mode.

Highlights
  • Practice CES-format questions
  • Offline access to all questions
  • Training and exam modes
  • Readiness score tracking
  • Review mistakes and save favorites
  • Searchable question bank
Features
Read full description

CES Trainer helps seafarers prepare for the CES (Crew Evaluation System) test. Practise CES-format questions for your department and level, see the correct answers, and know how ready you are before you visit the crewing office. Every question illustration is built into the app, so diagrams, symbols and photos open instantly, even offline on board. PRACTISE YOUR OWN TEST • Choose your department (Engine, Deck or Detailed), then the category and level, just like in the real CES. • Training mode shows the correct answer right after you choose. Exam mode keeps you guessing until the end. • Take 50 or 72 questions, or the whole category. Each new test continues where the last one stopped, so you cover every question. STUDY QUESTIONS WITH ANSWERS • Browse every question by department, category and level with the correct answer shown. • Search inside a category to find a topic fast. SEE HOW READY YOU ARE • A readiness score based on your last five tests, plus your best score and trend. • After each test: correct, wrong and skipped answers at a glance. • Review your mistakes: go through every wrong or skipped question with the correct answer highlighted. REPEAT THE TRICKY ONES • Save difficult questions to Favorites with one tap. • See which ones you missed last time and practise only your favorites. MADE FOR LIFE ON BOARD • Works completely offline. • Short sessions, a clean design and a dark mode that is easy on the eyes during a night watch. • Free, with no ads and no account. If the app helps you, you can buy the creator a beer in Settings. Question bank version 6.0.9. CES Trainer is an independent study app and is not affiliated with or endorsed by the official CES test provider. Some graphic elements created by Freepik.

Screenshots

Seabook Maritime4 screens
CES Trainer4 screens

Verdict

The call

The clearest difference is rating: CES Trainer at 5.0 against Seabook Maritime's 4.5. Seabook Maritime's advantage is in-app purchases (none vs 1) and ratings volume (19 vs 1). On price, update cadence, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. CES Trainer sells 1 one-off in-app purchase. Seabook Maritime asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

CES Trainer holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Seabook Maritime has 19 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Seabook Maritime ships an update every 16 months, CES Trainer every 11 months. The most recent releases landed on October 23, 2026 and October 13, 2026 respectively.

Scorecard5 real differences · 5 level
Seabook Maritime versus CES Trainer: the parameters behind the verdict, then further details
ParameterSeabook MaritimeCES Trainer
PriceFreeFree
Rating4.5 (19 ratings)5.0 (1 ratings) — better
Positive reviews79.1% of reviews—
Number of ratings19 — better1
Update frequencyEvery 16 monthsEvery 11 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better17.4
Further details — not scored
Size36 MB62 MB
Age rating4+12+
DeveloperOzgur GUNESYevgenii Kryzhanivskyi

Customer experience

Seabook Maritime

All ratings19 ratings
Positive89.5%
Neutral5.3%
Negative5.3%
Written reviews43 reviews
Positive79.1%
Neutral2.3%
Negative18.6%

CES Trainer

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Seabook Maritime

No in-app purchases

1 purchases

CES Trainer

One-time1
  • Buy me a beer$4.99

Questions

Is Seabook Maritime free?
Seabook Maritime is free to download, with no in-app purchases.
Is CES Trainer free?
CES Trainer is free to download, with in-app purchases available.
Which has better reviews, Seabook Maritime or CES Trainer?
CES Trainer is rated higher. Seabook Maritime averages 4.5 out of 5 from 19 ratings, while CES Trainer averages 5.0 from 1 ratings.
Do Seabook Maritime or CES Trainer have ads?
Neither Seabook Maritime nor CES Trainer shows ads.
Which is updated more often, Seabook Maritime or CES Trainer?
Seabook Maritime ships an update every 16 months, and CES Trainer every 11 months. Most recently, Seabook Maritime was updated on October 23, 2026 and CES Trainer on October 13, 2026.

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