DONIA vs Projecte Posidonia
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DONIA
This app provides detailed seabed visualization and marine information for safe and respectful sea navigation. It allows users to book mooring buoys, share observations, and monitor their vessels. Access premium features like high-definition charts for enhanced planning and exploration.
- Seabed visualization
- Marine information access
- Mooring buoy booking
- User observation sharing
- Navigation preparation and monitoring
- Mooring monitoring with alarms
- Offline mapping
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DONIA – Enjoy & protect the sea, together Donia is the reference app to choose your anchorages and navigate safely while minimizing your impact on the seabed. Join a community of over 100,000 sea enthusiasts who use DONIA to plan and experience their journeys across the Mediterranean and beyond. *** Visualize the seabed and anchor in the right place *** • High-precision mapping of marine habitats (Posidonia, coralligenous reefs, Cymodocea, sand and rock) • Enhanced anchoring assistance with weather conditions • Improved anchor alarm system • Smart selection of anchoring zones adapted to your vessel *** Complete nautical charts *** • Detailed mapping of navigation areas (French Mediterranean, Atlantic, Greece, Andalusia, Liguria, Croatia, Balearics) • Advanced integration of SHOM charts and HD bathymetric layers (Premium) • Optimized map display for real-time navigation *** A community of sailors *** • View and share sea observations • Rating system and favorites • Easy sharing inside and outside the app *** Donia Mooring – connected buoys *** • Connected mooring buoys for vessels over 24m • Dedicated anchoring zones • In-app booking, payment and management *** DONIA Premium *** • Advanced SHOM chart integration • Access to HD bathymetric layers A mission: protecting the sea Created by marine biologists and divers from Andromède Océanologie, DONIA aims to make seabed maps visible and accessible so everyone can contribute to their protection. Inspired by maritime solidarity, the app continuously evolves based on user feedback to become a more innovative, useful and effective anchoring tool. Information Using GPS in the background may significantly reduce battery life. Your subscription renews automatically unless you cancel it at least 24 hours before the end of the current billing period. Payment will be charged to your iTunes account upon confirmation of purchase. You can manage your subscriptions and turn off automatic renewal in your account settings after purchase. Privacy Policy: https://mooring.donia.fr/cgv/donia/cgv-donia-fr.pdf Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Projecte Posidonia
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Posidonia, a treasure of the Mediterranean, is a plant that forms very fragile marine ecosystems of extraordinary value that we must all work together to protect. This application will allow you to identify the different types of seabed off the coast of the Marina Alta of Alicante, helping you to anchor in a responsible way that is compatible with the conservation of seagrass meadows (Posidonia oceanica y Cymodocea nodosa) Join the efforts to protect these valuable ecosystems and share the application with your friends! The information provided by the application does not exempt the user from the obligation to ensure that their activity is compatible with current regulations in the field of marine biodiversity protection.
Screenshots
Verdict
The clearest difference is in-app purchases: Projecte Posidonia at none against DONIA's 2. On price, update cadence, 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
Both are free to download. DONIA sells 2 in-app purchases, starting at $2.49 per month. Projecte Posidonia asks for nothing beyond the download.
DONIA ships an update every 4 weeks, Projecte Posidonia fortnightly. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | DONIA | Projecte Posidonia |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (34 ratings) — better | — |
| Positive reviews | 63.3% of reviews | — |
| Number of ratings | 34 — better | — |
| Update frequency | Every 4 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 55 MB | 205 MB |
| Age rating | 4+ | 17+ |
| Developer | Andromede Oceanologie | INGEMATIC INGENIERIA DE SISTEMAS SL |
In-app purchases
DONIA
- DONIA® Premium Monthly7 Days trial$2.491 Month
- DONIA® Premium Version7 Days trial$22.991 Year
Projecte Posidonia
No in-app purchases








