WeatherGraph vs SailMeteo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WeatherGraph
Visualize weather forecasts from the National Weather Service in a clear graphical format. Track observations and forecasts for your chosen locations, with record highs and lows. Includes widgets for home and lock screens, and an Apple Watch app.
- Graphical weather forecasts
- NWS data integration
- 24-hour observations
- 7-day forecasts
- Record highs and lows
- Home/Lock Screen widgets
- Apple Watch app & complications
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WeatherGraph is a simple but powerful weather app for iPhone, iPad, and Apple Watch which displays weather forecasts in the United States from the National Weather Service (NWS) in an easy to read graphical format. WeatherGraph uses the highest quality weather data available - the same forecast and observations used by academic researchers and meteorologists. WeatherGraph features 24 hours of observations and 7 days of forecasts for the locations you choose and has the ability to display record highs and lows for each weather station you follow. WeatherGraph also has Home Screen and Lock Screen Widgets showing a graph of upcoming weather conditions and an Apple Watch app with complications showing the highs and lows and rain probability for the next 2 days. Due to the fact that all data comes from NWS/NOAA, this app will only provide weather forecasts for the United States of America.
SailMeteo
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Marine weather and sailboat routing, simple and clear, for every tack. SailMeteo brings marine weather, sailboat routing and the choice of an anchorage together in a fast, readable app built for people who actually go to sea. Wind, gusts, waves, currents: see it all on an interactive map, compare models and plan your passages — even offline, once you're out at sea. === FEATURES === - MARINE WEATHER ON A MAP Wind, gusts, waves, swell, currents, pressure, temperature, cloud cover, precipitation, visibility and CAPE, on an interactive map with clear wind barbs and readable colours. - MULTIPLE MODELS Compare several weather models (GFS, AROME and others) to sharpen your decision. Fine-mesh models capture coastal effects such as sea breezes far better. - TIME ANIMATION Scrub through the forecast hours with one gesture, and loop it to see how the weather turns hour by hour. - SAILSCORE: CHOOSING YOUR ANCHORAGE Tap a point in the water: SailMeteo rates how comfortable it would be at anchor, from the wind, the swell and above all the land that shelters it. A rose shows where you are sheltered from, and a curve follows the score hour by hour. Nothing is merely asserted: the stretch of open water, the chop it raises and how much swell actually reaches the point are all shown. - MY ANCHORAGES Save your anchorages: they stay on the map with their name, and are compared with each other for the coming night — ranked by the WORST score of the night, never an average that would hide a blow at 4 am. - WEATHER WATCH Turn the watch on at your anchorage: your position is saved and the app warns you before wind, gusts or sea go past YOUR thresholds, with the notice you choose, up to 48 hours. Alerts work with the app closed and with no network. Move away from the watched point and the watch stops and tells you. - SAILBOAT ROUTING Enter your boat (polars, motoring speed) and let SailMeteo compute a route that accounts for the forecast wind and keeps clear of land. Two approaches: "When to leave?" ranks the slots of the coming days, "Route this departure" optimises the time you chose. GPX import and export to your other navigation apps. - OFFLINE AT SEA Download an area before casting off and keep access to the forecast with no network once you are out. Ideal for stretches with no mobile coverage. - BOAT PROFILE Save your yacht's characteristics and polars, backed up in the cloud, for routing at your own pace. - MARINE WEATHER GUIDES Clear guides to understand the models, read a wind chart, judge the sea state and sea breezes, and prepare your passages. - MAKE IT YOURS Units of your choice (knots, km/h, Beaufort, metres, feet…), night mode to preserve your night vision, local time or UTC, north lock, looping playback. - ACCOUNT AND SYNC Create an account (e-mail, Apple or Google) to find your settings, areas, routes and anchorages on all your devices and on the web (sailmeteo.fr). Sync is instant. === SAFETY AT SEA === Forecasts, routing and SailScore are provided for guidance only. They replace neither official marine weather bulletins, nor the chart, the pilot book or your own seamanship. You remain solely responsible for preparing and for the safety of your passage. === YOUR DATA === - GDPR compliant - Data synced securely - Never sold to third parties - Full account deletion in one gesture, right inside the app === FREE === SailMeteo is free, funded by discreet advertising. A consent dialog lets you change your ad preferences at any time. === FAIR WINDS === Because every trip out deserves proper weather preparation. Made for sailors — contact@sailmeteo.fr --- Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sailmeteo.fr/confidentialite.html
Screenshots
Verdict
The clearest difference is in-app purchases: SailMeteo at none against WeatherGraph's 1. SailMeteo also leads on update cadence (every 3 days vs fortnightly). WeatherGraph's advantage is ads (none vs shown) and device support (5 vs 2). On price 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. WeatherGraph sells 1 one-off in-app purchase. SailMeteo asks for nothing beyond the download.
WeatherGraph ships an update fortnightly, SailMeteo every 3 days. The most recent releases landed on October 13, 2026 and October 5, 2026 respectively.
| Parameter | WeatherGraph | SailMeteo |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (103 ratings) — better | — |
| Positive reviews | 78.4% of reviews | — |
| Number of ratings | 103 — better | — |
| Update frequency | Fortnightly | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod, Mac, Apple Watch — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 43 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Catspaw Systems LLC | Sebastien AFFRE |
Bugs and requests
WeatherGraph
Reported bugs
3 issues- Widget does not update automatically
- Graph not showing in the app
- Inaccurate temperatures
Requested features
6 requests- Add international locations
- Zoom in on widget graph
- Add past observed weather conditions
- Include wind gust data (past/current/forecast)
- Add humidity and other NWS data
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- Add shapes/sizes to data points for rain/snow/storms
SailMeteo
Not enough reviews yet to summarise bugs or requests.
In-app purchases
WeatherGraph
- Upgrade WeatherGraph$3.99
SailMeteo
No in-app purchases
Questions
Is WeatherGraph free?
Is SailMeteo free?
Do WeatherGraph or SailMeteo have ads?
Which is updated more often, WeatherGraph or SailMeteo?
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