Weather4D Lite vs Forecast Alarm
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Weather4D Lite
Visualize complex atmospheric and oceanic data in 3D HD layers. Download and customize GRIB files from various models for detailed weather and sea condition forecasts. Compare different models and data types side-by-side.
- 3D HD weather data layers
- Automatic and manual animation
- Customizable GRIB file downloads
- Split-screen comparison (iPad)
- Multiple weather and oceanographic models
- Location-based forecasting
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Weather4D Lite is a powerful meteorological application based on atmospheric and oceanic data in GRIB format. It benefits from an interface derived from the “Routing & Navigation” version. View combined weather data displayed in 3D HD layers animated automatically or manually by sliding a finger on the screen. Use GFS model to get started. In addition, over 35 weather and oceanographic models are available with a yearly subscription (in-app purchase). Create your own geographical zones, select the models you need and download only the characteristics that matter to you: data type, resolution, periodicity, file size, etc. GRIB files can be downloaded anywhere through a regular or satellite internet connection. Split the screen (iPad only) to combine and/or compare: navigation and weather, weather and waves or currents, two weather models… The splitted screens can display charts at different scales. Create or import locations, combine them with GRIB forecast models and get a holistic view of the sea conditions. Default Models and Charts ———————————— GFS global forecast model at 0.25 °, 0.5 °, 1 ° and 2 ° resolutions. BING global chart OSM (Opens Street Map) global chart Optional Models (in-app purchase): ——————————————————— Weather -------- NAM USA GEM Global COAMPS Europe, West Atlantic, Central America, East Pacific ICON-EU Europe ARPEGE Global, Europe AROME France, Antilles, Guyane, Polynésie, Calédonie, Indien AROME HD France WRF France, Europe, Greece, NW Africa, Azores, Lesser Antilles, Greater Antilles Waves ------- MFWAM Global, Europe, France FNMOC WW3 Global, Europe Currents --------- MyOcean Global, IBI, NWS, Baltic, Med NCOM AMSEAS, USEAST, ALASKA, SOCAL, HAWAII
Forecast Alarm
Receive alerts for specific wind conditions based on various weather models. Configure notification frequency to stay informed about upcoming weather events.
- Wind threshold notifications
- Customizable notification frequency
- Supports multiple weather models (Arpège, Arome, GFS, ECMWF, Icon, etc.)
- Monitors weather forecasts
- User-friendly interface
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Set the wind threshold at which you want to receive a notification, configure the frequency of notifications and you can rest easy. Forecast Alarm monitors the Arpège, Arome, GFS, ECMWF, Icon, ECMWF AIFS, NAM USA, NAM Puerto Rico, NAM Haiti models for you. EULA: https://www.forecastalarm.fr/apple_eula_en.html
Screenshots
Verdict
The clearest difference is price: Forecast Alarm at Free against Weather4D Lite's $17.99. Forecast Alarm also leads on review sentiment (100% vs 68%) and update cadence (every 6 days vs every 2 months). Weather4D Lite's advantage is chart position (#144 vs unranked) and iOS requirement (13.0 vs 16.4). 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
Forecast Alarm is free to download; Weather4D Lite costs $17.99 up front. Weather4D Lite sells 2 one-off in-app purchases and Forecast Alarm sells 4 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.
Weather4D Lite ships an update every 2 months, Forecast Alarm every 6 days. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | Weather4D Lite | Forecast Alarm |
|---|---|---|
| Price | $17.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 68.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months | Every 6 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Best chart rank | #144 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 484 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | APP4NAV | Inia |
Customer experience
Weather4D Lite
Forecast Alarm
In-app purchases
Weather4D Lite
- 3 Months HD Forecast Subscription$17.99
- 1 Year HD Forecast Subscription$39.99
Forecast Alarm
- Abonnement Large Mensuel$5.991 Month
- Abonnement Large Plus Hebdomadaire$8.997 Days
- Annual Subscription$12.991 Year
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- Abonnement Large Annuel$17.991 Year
Questions
Is Weather4D Lite free?
Is Forecast Alarm free?
Do Weather4D Lite or Forecast Alarm have ads?
Which is updated more often, Weather4D Lite or Forecast Alarm?
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