Comparison

DONIA vs CoNav

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

Head to head
About

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.

Highlights
  • Seabed visualization
  • Marine information access
  • Mooring buoy booking
  • User observation sharing
  • Navigation preparation and monitoring
  • Mooring monitoring with alarms
  • Offline mapping
Features
Read full description

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/

About

CoNav

This app provides essential tools for deck officers, including compass error calculation, celestial navigation, and ETA calculations. It offers offline functionality with precise algorithms for various maritime tasks, such as unit conversion and port information.

Highlights
  • Compass Error Calculation
  • Celestial Navigation
  • ETA Calculation
  • Port UN LOCODE Database
  • Units Converter
  • True Wind Calculation
  • Offline Functionality
Features
Currently charting
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Deck Officer's Tools: - Compass Error Calculation - Celestial Navigation - E.T.A Calculation - Port UN LOCODE - Units Converter - True Wind Calculation The app runs offline and all calculations are done within the app using precise and sophisticated algorithms. Compass Error Calculation 64 Celestial Objects. Precise bearing and altitude. Automatic calculation of magnetic variation. Complete calculation according to all requirements. Suitable for all types of ship logs. Hiding celestial objects below the horizon is available. Celestial Navigation Three position lines for calculating the ship's position. A function is available for mapping the lines of position and the calculated position of the vessel. The sunrise and sunset function is available as well as Twilight Nautical and Twilight Civil. E.T.A Calculation High precision Great user interface Vessel speed adjustment function Port UN LOCODE 18,000 seaports Brief information on the seaport Units Converter 15 Dimensions Volume Length Angle Mass Temperature Speed Duration Area Power Pressure Frequency Energy Electric Resistance El. Potential Difference Electric Current This app will save you a lot of time and allow you to steer your boat even more safely. If you have questions or suggestions, please email yvvofficial@yahoo.com or on the Instagram page conav_.

Screenshots

DONIA4 screens
CoNav4 screens

Verdict

The call

The clearest difference is price: DONIA at Free against CoNav's $6.99. DONIA also leads on rating (4.5 vs 4.0) and ratings volume (31 vs 6). CoNav's advantage is in-app purchases (none vs 2) and review sentiment (83% vs 59%). On update cadence and ads 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

DONIA is free to download; CoNav costs $6.99 up front. DONIA sells 2 in-app purchases, starting at $2.49 per month. CoNav asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

DONIA holds the better App Store score, 4.5 against 4.0. That said, the two scores are not equally well evidenced: DONIA has 31 ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 59% of DONIA's written reviews are positive against 83% of CoNav's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

DONIA ships an update fortnightly, CoNav every 3 weeks. The most recent releases landed on September 22, 2026 and September 23, 2026 respectively.

Scorecard9 real differences · 2 level
DONIA versus CoNav: the parameters behind the verdict, then further details
ParameterDONIACoNav
PriceFree — better$6.99
Rating4.5 (31 ratings) — better4.0 (6 ratings)
Positive reviews59.3% of reviews83.3% of reviews — better
Number of ratings31 — better6
Update frequencyFortnightly — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium — betterPaid
Best chart rank—#173 — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS11.0 — better16.0
Further details — not scored
Size61 MB17 MB
Age rating4+4+
DeveloperAndromede OceanologieVladyslav Yarmak

Customer experience

DONIA

All ratings31 ratings
Positive87.1%
Neutral0.0%
Negative12.9%
Written reviews27 reviews
Positive59.3%
Neutral22.2%
Negative18.5%

CoNav

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews96 reviews
Positive83.3%
Neutral8.3%
Negative8.3%

In-app purchases

2 purchases

DONIA

Subscriptions2
  • DONIA® Premium Monthly7 Days trial$2.491 Month
  • DONIA® Premium Version7 Days trial$22.991 Year
None

CoNav

No in-app purchases

Questions

Is DONIA free?
DONIA is free to download, with in-app purchases available.
Is CoNav free?
CoNav costs $6.99, with no in-app purchases.
Which has better reviews, DONIA or CoNav?
DONIA is rated higher. DONIA averages 4.5 out of 5 from 31 ratings, while CoNav averages 4.0 from 6 ratings.
Do DONIA or CoNav have ads?
Neither DONIA nor CoNav shows ads.
Which is updated more often, DONIA or CoNav?
DONIA ships an update fortnightly, and CoNav every 3 weeks. Most recently, DONIA was updated on September 22, 2026 and CoNav on September 23, 2026.

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