Avalon Offshore vs Marées
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Avalon Offshore
This app provides advanced weather routing and navigation for sailors. It offers detailed weather forecasts from numerous models, collision alerts, and route optimization based on boat draft. Compatible with various nautical maps and augmented reality glasses.
- Advanced weather routing
- NMEA 0183 and AIS integration
- Collision alarm
- Regatta start management
- 65 automatic weather models
- Bathymetric routing
- Navionics Boating map compatibility
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Avalon Offshore is a complete weather routing and navigation application . It works on iPads and iPhones. It also works on the new generation of Macbook Air and Pro,equipped with an ARM 64 chipset. Avalon Offshore integrated the whole set of functions that are useful to cruisers and offshore racers; weather routing, weather, navigation with NMEA 0183 and AIS collision alarm, anchoring alert, regatta start management wit laylines, etc… Avalon includes automatic loading of 65 weather models: NOAA GFS, Metro France Arpege,and Arome, DVD Icon, OpenWRF Skiron, etc Avalon also includes advanced functions such as: - Bathymetric weather routing, allowing calculation of routes taking into consideration the draft of the boat. - Simultaneous comparaison of routes across different weather models, different routes options, etc… - Free use of Avalon VPP to calculate customised VPP polars for single hull boats (main sail + genoa, code 0, gennaker, spinnaker, staysail and mizzen sail. - High compression of weather data on several models (GFS, Arpege, Icon, NAM Caraïbes et USA East) enabling to reduce by up to 95% volume of data, very efficient for satellite transmission (Iridium Go, Iridium Inmarsat, etc) - Easy weather routing module (from harbor to harbor) for a quick start of the app. - Compatible with ©Navionics Boating maps without additional cost. - Interfaced with ©Navily for a quick selection of the best moorings and harbors. - On time arrival : Calculate departure time to arrive on a given time - Compatible with ActiveLook® Augmented Reality glasses VPP Polars - Free use of Avalon VPP to customize your boat velocity preduction and adapt them to the exact caracteristics of your boat - Polar captation at sea Nautical Maps - Free raster nautical maps: NOAA, Linz, Brasil, New Zealand - In-app pack of maps derived from UKHO or SHOM covering France, UK Belgium, Portugal, Spain Carribean, Eastern and Western Mediterranean, Transatlantic, ... - Personal maps support: mbtiles, tif, kap, geotiff - Navionics maps: You can use your Navionics Boating maps with Avalon free of charge. Weather Sources - 65 automatic weather sources (wind, gust, current, wave and general weather) included in the Premium Option (in-app purchase) - Capability to load external grib files (as an alternative to the Premium option) - Capability to load external current grib from Tidetech® Includes one month free use of Premium options (see below) IN-APP PURCHASE: PREMIUM OPTION Includes: - Iridium data compression (reduce by 6 transmitted volumes) - additional weather sources: Arome, Arpege, NAM, CEP, Skiron .... - Weather data up to 394 hours including Wind, Gust, Waves, Precipitation, Storms, Cloud Coverage, Pressure, Temperature - Integration of currents in route calculation in covered areas (worldwide, Iberia Biscay and Ireland and Mediterranean sea) - Waves (Swell and wind waves) Privacy Policy and Terms of Use at: http://www.avalon-routing.com/new/privacy/ Warning: Continued use of GPS running in the background can dramatically decrease battery life. Policy and Terms of Use at: http://www.avalon-routing.com/new/privacy/
Marées
Provides tide schedules, heights, and coefficients for over 150 French ports and some British ports. It operates autonomously, requiring internet only for updates and maps, and does not use geolocation data outside the app.
- Tide schedules for 150+ French ports
- Tide data for British ports
- Harmonic constants from Previ Mer
- Autonomous operation
- Customizable tide height thresholds
- Local time display (summer/winter)
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Schedule, heights and coefficients of the tides on more than 150 French ports and some ports in Great Britain. Application made from the harmonic constants provided by Previ Mer. It is completely autonomous: the internet connection is only used for updates and for displaying maps. No advertising. No use of geolocation data outside the application and only to locate the nearest port. All local times displayed are summer and winter times. The menu allows you to calculate the tides and give the specifics for a day Set your own threshold (minimum height for practicing navigation or maximum for fishing on foot). Ask for other ports if necessary. Thank you for sharing your comments in order to further improve the application.
Screenshots
Verdict
The clearest difference is review sentiment: Avalon Offshore at 75% against Marées's 6%. Marées's advantage is price ($1.99 vs $35.00) and in-app purchases (none vs 21). On update cadence, ads, device support and iOS requirement 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
Avalon Offshore costs $35.00 and Marées $1.99 up front. Avalon Offshore sells 21 in-app purchases, starting at $39.99 per year. Marées asks for nothing beyond the download.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.
| Parameter | Avalon Offshore | Marées |
|---|---|---|
| Price | $35.00 | $1.99 — better |
| Rating | — | 1.0 (1 ratings) — better |
| Positive reviews | 75.0% of reviews — better | 6.3% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 66 MB | 54 MB |
| Age rating | 4+ | 17+ |
| Developer | Avalon Navigation Systems | Christian Guine |
Customer experience
Avalon Offshore
Marées
In-app purchases
Avalon Offshore
- Premium Subscription$39.991 Year
- England and Ireland South 2024$29.00
- Portugal and Spain North 2024$29.00
- East Mediterranean 2024$29.00
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- Transatlantic Islands 2024$29.00
- West Mediterranean 2024$29.00
- Benelux and England East 2024$29.00
- East Mediterranean 2023$39.00
- Benelux and England East 2022$39.00
- England and Ireland South 2023$39.00
- Transatlantic Islands 2023$39.00
- West Mediterranean 2023$39.00
- Portugal and Spain North 2023$39.00
- UK and Ireland 2024$39.00
- UK and Ireland 2023$49.00
- France Mediterranee 2023 SHOM$99.99
- Lesser Antillas 2023$99.99
- SHOM 2024 - France Med$99.99
- Lesser Antillas 2024$99.99
- SHOM 2024 - France Manche$99.99
- SHOM 2024 - France Atlantique$99.99
Marées
No in-app purchases
Questions
Is Avalon Offshore free?
Is Marées free?
Do Avalon Offshore or Marées have ads?
Which is updated more often, Avalon Offshore or Marées?
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