Comparison

ForeignSail vs Yachtmaster Theory Prep

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

Head to head
About

ForeignSail

Features
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ForeignSail is the ultimate nautical terminology companion for sailors, boaters, and maritime professionals navigating international waters. Whether you're docking in a French marina, buying equipment in Spain, or sailing with an Italian crew, ForeignSail helps you communicate with confidence. TRANSLATE Search over 1,000 nautical terms instantly across English, French, Spanish, and Italian. Each term includes definitions in all four languages so you always understand the full meaning, not just the word. IDENTIFY Point your camera at any piece of boat equipment and our AI will identify it and find the matching nautical term in all four languages. Works with cleats, winches, blocks, lines, and hundreds of other marine items. CONVERT Built-in nautical unit converter for the measurements sailors use every day: • Knots, km/h, mph, m/s • Nautical miles, kilometers, meters, feet, fathoms, inches • Kilograms, pounds, long tons • Liters, US gallons, imperial gallons • Pressure: hPa, inches Hg • Temperature: Celsius, Fahrenheit OFFLINE ACCESS Premium subscribers can access the full term database offline — perfect when you're at sea without a signal. GO PREMIUM Upgrade to remove ads and unlock full offline access. One-time lifetime purchase available. Built by sailors, for sailors.

About

Yachtmaster Theory Prep

Features
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Yachtmaster Theory Prep is an unofficial exam-prep app for Coastal Skipper and Yachtmaster Offshore shorebased theory — advanced chartwork, tidal calculations, meteorology, IRPCS/COLREGS, passage planning, electronic navigation, and safety procedures. IMPORTANT: Full access requires an In-App Purchase (auto-renewable subscription or lifetime). The download is free; practice content unlocks after purchase. Restore Purchases is always available on the paywall and in Settings. WHAT YOU GET • 550+ original multiple-choice questions across Yachtmaster theory topics • Chartwork & navigation, tides & tidal streams, meteorology, IRPCS/COLREGS, passage planning, electronic navigation, pilotage, and safety & emergency • Timed paper-style mocks (40 questions Ā· 60 minutes Ā· 70% pass mark style practice) • Quick practice, practice-by-topic, weak-area drills • Tidal height, secondary port, course-to-steer, and DST calculators with worked examples • Review incorrect answers and bookmarks • Flashcards with spaced repetition • Progress dashboard: readiness %, mastery, streak, course/exam countdown • Works fully offline — no account required WHO IT'S FOR Sailors preparing for Coastal Skipper or Yachtmaster Offshore shorebased theory, or anyone refreshing advanced coastal navigation and collision regulations. COMPLIANCE & DISCLAIMER Independent study aid by MD Shahariar Nazim Joy. Not affiliated with, endorsed by, or connected to the Royal Yachting Association (RYA) or any awarding body. Original questions written from public collision regulations and standard navigation practice. Practising here does not guarantee a pass. Always follow current regulations, official charts, and good seamanship afloat. SUBSCRIPTIONS (USD) • Monthly Premium — $6.99 / month • Yearly Premium — $19.99 / year (best value) • Lifetime Access — $29.99 one-time Payment is charged to your Apple Account. Subscriptions auto-renew unless cancelled at least 24 hours before the period ends. Manage in App Store account settings. Privacy Policy: https://joykhansayan1.github.io/yachtmaster-theory-prep/privacy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Support: https://joykhansayan1.github.io/yachtmaster-theory-prep/support.html

Screenshots

ForeignSail4 screens
Yachtmaster Theory Prep4 screens

Verdict

The call

The clearest difference is ads: Yachtmaster Theory Prep at none against ForeignSail's shown. ForeignSail's advantage is update cadence (every 5 days vs every 2 months) and iOS requirement (15.1 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. ForeignSail sells 1 one-off in-app purchase and Yachtmaster Theory Prep sells 3 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

ForeignSail ships an update every 5 days, Yachtmaster Theory Prep every 2 months. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.

Scorecard3 real differences Ā· 3 level
ForeignSail versus Yachtmaster Theory Prep: the parameters behind the verdict, then further details
ParameterForeignSailYachtmaster Theory Prep
PriceFreeFree
Update frequencyEvery 5 days — betterEvery 2 months
AdsYesNo — better
In-app purchasesYesYes
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.1 — better17.0
Further details — not scored
Size43 MB2 MB
Age rating4+4+
DeveloperRonnie MaioliMD Shahariar Nazim Joy

In-app purchases

1 purchases

ForeignSail

One-time1
  • Premium Lifetime$5.99
3 purchases

Yachtmaster Theory Prep

Subscriptions2
  • Monthly Premium$6.991 Month
  • Yearly Premium$19.991 Year
One-time1
  • Lifetime Access$29.99

Questions

Is ForeignSail free?
ForeignSail is free to download, with in-app purchases available.
Is Yachtmaster Theory Prep free?
Yachtmaster Theory Prep is free to download, with in-app purchases available.
Do ForeignSail or Yachtmaster Theory Prep have ads?
ForeignSail shows ads; Yachtmaster Theory Prep does not.
Which is updated more often, ForeignSail or Yachtmaster Theory Prep?
ForeignSail ships an update every 5 days, and Yachtmaster Theory Prep every 2 months. Most recently, ForeignSail was updated on October 28, 2026 and Yachtmaster Theory Prep on October 29, 2026.

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