# Weather4D Lite vs FD Viewer

The clearest difference is price: FD Viewer at Free against Weather4D Lite's $17.99. FD Viewer also leads on in-app purchases (none vs 2) and update cadence (every 2 weeks vs every 2 months). Weather4D Lite's advantage is chart position (#144 vs unranked) and iOS requirement (13.0 vs 16.0). On rating, ratings volume, ads and device support there is nothing between them.

FD Viewer is free to download; Weather4D Lite costs $17.99 up front. Weather4D Lite sells 2 one-off in-app purchases. FD Viewer asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Weather4D Lite against 5.0 for FD Viewer. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Weather4D Lite ships an update every 2 months, FD Viewer every 2 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Weather4D Lite | FD Viewer |
| --- | --- | --- |
| Price | $17.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/weather4d-lite/id418723845/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/fd-viewer/id1550977564/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 68.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Paid | **Free** |
| Best chart rank | **#144** | — |
| Size | 484 MB | 2 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [APP4NAV](https://appshunter.io/developer/418723848) | [Neil Cormia](https://appshunter.io/developer/1056328330) |

## What reviewers say

### Weather4D Lite

[App page](https://appshunter.io/ios/app/weather4d-lite/id418723845)

**Currently charting:** #144 Top Paid · Weather (US App Store)

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:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 Months HD Forecast Subscription | $17.99 | one-time |
| 1 Year HD Forecast Subscription | $39.99 | one-time |


### FD Viewer

[App page](https://appshunter.io/ios/app/fd-viewer/id1550977564)

Access and read detailed text weather products from the National Weather Service. This app reformats Area Forecast Discussions into a user-friendly interface, allowing easy navigation through sections and offices.

**Highlights:** Read Area Forecast Discussions (AFDs), View NWS offices on a map, List offices by distance or alphabetically, Paginated section navigation, User-friendly reformatting of weather data

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Weather4D Lite free?

Weather4D Lite costs $17.99, and also offers in-app purchases.

### Is FD Viewer free?

FD Viewer is free to download, with no in-app purchases.

### Which has better reviews, Weather4D Lite or FD Viewer?

Weather4D Lite and FD Viewer are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Weather4D Lite or FD Viewer have ads?

Neither Weather4D Lite nor FD Viewer shows ads.

### Which is updated more often, Weather4D Lite or FD Viewer?

Weather4D Lite ships an update every 2 months, and FD Viewer every 2 weeks. Most recently, Weather4D Lite was updated on November 6, 2026 and FD Viewer on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*