Comparison

Météo Nantes vs Avalon Offshore

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

Head to head
About

Météo Nantes

This application provides professional, real-time weather forecasts and climatological data specifically for the Nantes metropolitan area. It features updates multiple times a day, a network of weather stations and webcams, and a unique historical database of weather events in France since 1850.

Highlights
  • Real-time weather updates
  • Local weather forecasts
  • Climatological data
  • Weather station network
  • Webcam access
  • Historical weather events database
Features
Read full description

Dirigé par des météorologistes (dont Guillaume Séchet, présentateur météo à la télévision et auteur de plusieurs ouvrages sur le climat), ce site internet professionnel et gratuit est devenu la référence pour toute l'agglomération Nantaise. Il est effet spécifiquement dédié au temps qu'il fait et qu'il va faire sur cette région avec un réseau de stations météo et de webcams, de nombreuses données climatologiques et des pages sur la situation météo en temps réel. Outre le fait que les informations soient réactualisées plusieurs fois par jour, il s'agit également d'un site météo pour le monde entier et surtout une banque de données unique sur les évènements météo qui ont eu lieu en France depuis 1850.

About

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.

Highlights
  • Advanced weather routing
  • NMEA 0183 and AIS integration
  • Collision alarm
  • Regatta start management
  • 65 automatic weather models
  • Bathymetric routing
  • Navionics Boating map compatibility
Features
Read full description

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/

Screenshots

Météo Nantes4 screens
Avalon Offshore4 screens

Verdict

The call

The clearest difference is price: Météo Nantes at Free against Avalon Offshore's $35.00. Météo Nantes also leads on review sentiment (100% vs 75%) and iOS requirement (9.0 vs 13.0). Avalon Offshore's advantage is update cadence (every 3 weeks vs every 4 months). On ads, in-app purchases 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

Météo Nantes is free to download; Avalon Offshore costs $35.00 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Météo Nantes ships an update every 4 months, Avalon Offshore every 3 weeks. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

Scorecard5 real differences · 3 level
Météo Nantes versus Avalon Offshore: the parameters behind the verdict, then further details
ParameterMétéo NantesAvalon Offshore
PriceFree — better$35.00
Positive reviews100.0% of reviews — better75.0% of reviews
Update frequencyEvery 4 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS9.0 — better13.0
Further details — not scored
Size27 MB66 MB
Age rating17+4+
DeveloperMETEO-VILLESAvalon Navigation Systems

Customer experience

Météo Nantes

Written reviews20 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Avalon Offshore

Written reviews24 reviews
Positive75.0%
Neutral4.2%
Negative20.8%

In-app purchases

None

Météo Nantes

No in-app purchases

None

Avalon Offshore

No in-app purchases

Questions

Is Météo Nantes free?
Météo Nantes is free to download, with no in-app purchases.
Is Avalon Offshore free?
Avalon Offshore costs $35.00, with no in-app purchases.
Do Météo Nantes or Avalon Offshore have ads?
Neither Météo Nantes nor Avalon Offshore shows ads.
Which is updated more often, Météo Nantes or Avalon Offshore?
Météo Nantes ships an update every 4 months, and Avalon Offshore every 3 weeks. Most recently, Météo Nantes was updated on November 1, 2026 and Avalon Offshore on November 6, 2026.

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