Comparison

Weather4D Lite vs Forecast Alarm

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

Head to head
About

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.

Highlights
  • 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
Features
Currently charting
Read full description

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

About

Forecast Alarm

Receive alerts for specific wind conditions based on various weather models. Configure notification frequency to stay informed about upcoming weather events.

Highlights
  • Wind threshold notifications
  • Customizable notification frequency
  • Supports multiple weather models (Arpège, Arome, GFS, ECMWF, Icon, etc.)
  • Monitors weather forecasts
  • User-friendly interface
Features
Read full description

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

Weather4D Lite4 screens
Forecast Alarm4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 5 level
Weather4D Lite versus Forecast Alarm: the parameters behind the verdict, then further details
ParameterWeather4D LiteForecast Alarm
Price$17.99Free — better
Rating5.0 (1 ratings) — better—
Positive reviews68.0% of reviews100.0% of reviews — better
Number of ratings1 — better—
Update frequencyEvery 2 monthsEvery 6 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#144 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.4
Further details — not scored
Size484 MB54 MB
Age rating4+4+
DeveloperAPP4NAVInia

Customer experience

Weather4D Lite

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews50 reviews
Positive68.0%
Neutral2.0%
Negative30.0%

Forecast Alarm

Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Weather4D Lite

One-time2
  • 3 Months HD Forecast Subscription$17.99
  • 1 Year HD Forecast Subscription$39.99
4 purchases

Forecast Alarm

Subscriptions4
  • Abonnement Large Mensuel$5.991 Month
  • Abonnement Large Plus Hebdomadaire$8.997 Days
  • Annual Subscription$12.991 Year
Show 1 more
  • Abonnement Large Annuel$17.991 Year

Questions

Is Weather4D Lite free?
Weather4D Lite costs $17.99, and also offers in-app purchases.
Is Forecast Alarm free?
Forecast Alarm is free to download, with in-app purchases available.
Do Weather4D Lite or Forecast Alarm have ads?
Neither Weather4D Lite nor Forecast Alarm shows ads.
Which is updated more often, Weather4D Lite or Forecast Alarm?
Weather4D Lite ships an update every 2 months, and Forecast Alarm every 6 days. Most recently, Weather4D Lite was updated on November 6, 2026 and Forecast Alarm on November 3, 2026.

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