Maritime Master vs SailPrep
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Maritime Master
Learn seamanship and small-craft navigation with interactive diagrams and calculators. Practice plotting positions, understanding tides, and mastering navigation techniques. Includes a reference library for essential maritime knowledge.
- Interactive diagrams and calculators
- Dead reckoning and estimated position plotting
- Tidal height and stream visualization
- Position fixing and compass error modules
- COLREGs, VHF, and meteorology reference
- Speed-time-distance and unit conversion calculators
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Maritime Master – Skipper is a learning companion for seamanship and small-craft navigation. It explains core concepts with interactive diagrams and clear calculators so you can practise the methods, see the effects of wind and current, and build confidence before you go afloat. Train the full workflow from plan to pilotage. Plot dead reckoning and estimated positions, add leeway, and model set and drift to understand motion over the ground. Work out a course to steer to make good a desired track, then explore how small changes in time, speed or current alter the result. A position-fixing module shows how one, two or three bearings intersect, while the compass section helps you understand deviation and compass error. Tides are presented visually to make the theory stick. Compare the Rule of Twelfths with a sine-curve model, step through time to see heights change, and review tidal streams in an easy atlas format. Passage-planning and pilotage notes turn chartwork techniques into practical checklists for entering and leaving harbour. A built-in reference library keeps key knowledge together for study: COLREGs text with buoyage, sound signals, day shapes and rules of the road; VHF channels and radio frequencies; concise emergency procedure overviews; plus meteorology essentials including the Beaufort scale, Douglas sea states, wind barbs, cloud types, weather fronts and the Coriolis effect. Calculators cover speed–time–distance, ETA, set and drift, position fixing, rhumb vs great-circle distance, true wind and comprehensive unit conversions. Training-only notice: Maritime Master – Skipper is for education, revision and simulation. It is not a substitute for official charts, publications, instruments or certified training, and must not be used for real-world navigation or operational decision-making. Always navigate using approved sources and local notices to mariners.
SailPrep
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Whether you're taking your first sailing course, preparing for a certification, or simply want to refresh your knowledge before heading out on the water, SailPrep helps you become a safer and more confident skipper. Designed for both beginners and experienced sailors, SailPrep combines structured learning with quick revision and spaced repetition so important knowledge stays fresh—even after you've passed your exam. Prepare for sailing exams Study for popular sailing qualifications including: Lithuanian LBS boating and sailing exams RYA theory courses Day Skipper Coastal Skipper ICC preparation SRC radio basics ...and many other recreational boating courses. Learn faster Master essential topics including: COLREGs (Collision Regulations) CEVNI inland waterway rules Navigation Buoys and marks Lights and shapes Sound signals Safety equipment Weather Knots and lines Seamanship First aid Anchoring Mooring And much more. Stay sharp with smart notifications Learning shouldn't stop after the exam. Receive short, useful notifications containing: exam facts common mistakes quick revision questions safety reminders practical sailing tips Perfect for keeping your knowledge fresh throughout the sailing season. Study anywhere Flashcards Quiz mode Progress tracking Learn at your own pace Quick revision before sailing trips Bite-sized lessons that fit into your day Whether you're preparing for your first lesson, your next exam, or your next sailing adventure, SailPrep helps you become a better, safer sailor. Learn. Remember. Sail confidently. Terms of Use: https://monikazibolyte.github.io/SailPrep/terms.html Privacy Policy: https://monikazibolyte.github.io/SailPrep/privacy-policy.html Subscription Terms: https://monikazibolyte.github.io/SailPrep/subscription-terms.html
Screenshots
Verdict
The clearest difference is update cadence: SailPrep at every 2 weeks against Maritime Master's every 6 weeks. SailPrep also leads on iOS requirement (15.1 vs 17.6). On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Maritime Master ships an update every 6 weeks, SailPrep every 2 weeks. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.
| Parameter | Maritime Master | SailPrep |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 6 weeks | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 10 MB | 66 MB |
| Age rating | 4+ | 4+ |
| Developer | MARITIME MASTER LIMITED | Monika Zibolyte |
In-app purchases
Maritime Master
No in-app purchases
SailPrep
No in-app purchases









