Comparison

PosidoniaMaps vs Doyle Guides

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

Head to head
About

PosidoniaMaps

This app provides high-resolution underwater maps to help boaters navigate and find safe mooring spots, even in poor visibility. It aims to protect vital Posidonia oceanic meadows by making them visible and encouraging responsible anchoring.

Highlights
  • High-resolution underwater maps
  • Safe mooring guidance
  • Low visibility navigation
  • Posidonia meadow mapping
  • Environmental protection tool
Features
Read full description

Initiated in Formentera, a project to map Posidonia oceanic meadows and make them visible with an app and google earth. Every square meter of mapped and visible Posidonia is a protected meadow. In the past 50 years, it is estimated 34% of Posidonia meadows have been lost in the Western Mediterranean (Telesca et al., 2015). This loss is due to damage caused by trawlers, boat moorings, coastal development, eutrophication, and pollution. Damage caused by boats’ anchors has been recorded at various coastal marine habitats worldwide; for example, coral reefs (Dinsdale & Harriott, 2004). Anchoring also has negative consequences on Posidonia (Milazzo M., 2004; Francour P., 1999), and has caused the disappearance of large prairies in some areas of the Balearic Islands (San Felix, in press, 1994). This App provides direct access to high-resolution underwater maps to ensure proper mooring even in low visibility conditions.

About

Doyle Guides

Access comprehensive sailing guides for the southern Caribbean, featuring nautical charts, regulations, services, and points of interest. The app offers an interactive map with user-generated comments and corrections, all free to use. In-app purchases provide access to detailed guide book content.

Highlights
  • Comprehensive sailing guides
  • Nautical charts and navigation
  • Interactive satellite map
  • 3000+ points of interest database
  • User comments and corrections
  • Island-specific content bundles
Features
Read full description

Doyle Guides produces the southern Caribbean's most comprehensive and up-to-date sailing guides, complete with nautical charts and navigational information, details on regulations, customs and immigration, general and technical yacht services, marinas, restaurants, provisioning, shore-based attractions, and more. The Doyle Guides mobile app allows users to search our comprehensive 3000+ point of interest database with results shown based on distance from the user and displayed on an interactive satellite map where users can leave public comments as well as suggest corrections and new points of interest, all free of charge. Subscriptions to guide book content is available on both long and short term basis, as well as bundled by island.

Screenshots

PosidoniaMaps4 screens
Doyle Guides4 screens

Verdict

The call

The clearest difference is in-app purchases: PosidoniaMaps at none against Doyle Guides's 18. PosidoniaMaps also leads on review sentiment (80% vs 60%) and iOS requirement (14.5 vs 16.6). Doyle Guides's advantage is update cadence (monthly vs every 5 months). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Doyle Guides sells 18 in-app purchases, starting at $9.99 per month. PosidoniaMaps asks for nothing beyond the download.

UpkeepUpdate frequency

PosidoniaMaps ships an update every 5 months, Doyle Guides monthly. The most recent releases landed on June 1, 2026 and September 8, 2026 respectively.

Scorecard5 real differences · 5 level
PosidoniaMaps versus Doyle Guides: the parameters behind the verdict, then further details
ParameterPosidoniaMapsDoyle Guides
PriceFreeFree
Rating—4.3 (50 ratings) — better
Positive reviews80.0% of reviews — better60.0% of reviews
Number of ratings—50 — better
Update frequencyEvery 5 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.5 — better16.6
Further details — not scored
Size68 MB41 MB
Age rating4+4+
DeveloperMovired 2000 S.L.Chris Doyle Publishing Limited

Customer experience

PosidoniaMaps

Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

Doyle Guides

All ratings50 ratings
Positive80.0%
Neutral8.0%
Negative12.0%
Written reviews10 reviews
Positive60.0%
Neutral10.0%
Negative30.0%

In-app purchases

None

PosidoniaMaps

No in-app purchases

18 purchases

Doyle Guides

Subscriptions18
  • Trinidad & Tobago - 1 month3 Days trial$9.991 Month
  • Martinique Sailing Guide3 Days trial$19.991 Month
  • St. Lucia Sailing Guide3 Days trial$19.991 Month
Show 15 more
  • St. Vincent Sailing Guide3 Days trial$19.991 Month
  • Grenada Package - 1 month3 Days trial$19.991 Month
  • Trinidad Tobago Sailing Guide7 Days trial$19.991 Year
  • Martinique Sailing Guide7 Days trial$24.991 Year
  • St. Lucia Sailing Guide7 Days trial$24.991 Year
  • St. Vincent Sailing Guide7 Days trial$24.991 Year
  • Grenada Package - 12 months7 Days trial$24.991 Year
  • Southern Leeward Sailing Guide3 Days trial$24.991 Month
  • Northern Leeward Sailing Guide3 Days trial$24.991 Month
  • Windward Islands Guide3 Days trial$29.991 Month
  • BVI Cruising Guide3 Days trial$29.991 Year
  • Windward Islands Guide7 Days trial$39.991 Year
  • Virgin Islands Cruising Guide3 Days trial$39.991 Year
  • Leeward Islands Sailing Guide3 Days trial$39.991 Month
  • Leeward Islands Sailing Guide7 Days trial$59.991 Year

Questions

Is PosidoniaMaps free?
PosidoniaMaps is free to download, with no in-app purchases.
Is Doyle Guides free?
Doyle Guides is free to download, with in-app purchases available.
Do PosidoniaMaps or Doyle Guides have ads?
Neither PosidoniaMaps nor Doyle Guides shows ads.
Which is updated more often, PosidoniaMaps or Doyle Guides?
PosidoniaMaps ships an update every 5 months, and Doyle Guides monthly. Most recently, PosidoniaMaps was updated on June 1, 2026 and Doyle Guides on September 8, 2026.

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