# Weather4D Routing vs Avalon Offshore

The clearest difference is price: Avalon Offshore at $35.00 against Weather4D Routing's $39.99. Avalon Offshore also leads on update cadence (every 3 weeks vs every 3 months) and review sentiment (75% vs 66%). Weather4D Routing's advantage is chart position (#167 vs unranked). On ads, in-app purchases, monetization model and device support there is nothing between them.

Weather4D Routing costs $39.99 and Avalon Offshore $35.00 up front. Weather4D Routing sells 2 one-off in-app purchases and Avalon Offshore sells 21 in-app purchases, starting at $39.99 per year. Whichever you choose, the download price is not the number that matters.

Weather4D Routing ships an update every 3 months, Avalon Offshore every 3 weeks. The most recent releases landed on October 20, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Weather4D Routing | Avalon Offshore |
| --- | --- | --- |
| Price | $39.99 | **$35.00** |
| Positive reviews | 66.0% of reviews | **75.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#167** | — |
| Size | 488 MB | 66 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [APP4NAV](https://appshunter.io/developer/418723848) | [Avalon Navigation Systems](https://appshunter.io/developer/1802181177) |

## What reviewers say

### Weather4D Routing

[App page](https://appshunter.io/ios/app/weather4d-routing/id480096611)

**Currently charting:** #167 Top Paid · Weather (US App Store)

This app provides advanced weather forecasting and route optimization for sailing. It uses GRIB data, boat polar characteristics, and various meteorological models to plan efficient and safe journeys.

**Highlights:** GRIB weather and ocean data analysis, Customizable GRIB file downloads, Optimized sailing and engine routes, Wind and wave constraint consideration, Multiple route comparison, Real-time routing updates

**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 |


### Avalon Offshore

[App page](https://appshunter.io/ios/app/avalon-offshore/id975313021)

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:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (21)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Subscription | $39.99 | per year |
| England and Ireland South 2024 | $29.00 | one-time |
| Portugal and Spain North 2024 | $29.00 | one-time |
| East Mediterranean 2024 | $29.00 | one-time |
| Transatlantic Islands 2024 | $29.00 | one-time |
| West Mediterranean 2024 | $29.00 | one-time |
| Benelux and England East 2024 | $29.00 | one-time |
| East Mediterranean 2023 | $39.00 | one-time |
| Benelux and England East 2022 | $39.00 | one-time |
| England and Ireland South 2023 | $39.00 | one-time |
| Transatlantic Islands 2023 | $39.00 | one-time |
| West Mediterranean 2023 | $39.00 | one-time |
| Portugal and Spain North 2023 | $39.00 | one-time |
| UK and Ireland 2024 | $39.00 | one-time |
| UK and Ireland 2023 | $49.00 | one-time |
| France Mediterranee 2023 SHOM | $99.99 | one-time |
| Lesser Antillas 2023 | $99.99 | one-time |
| SHOM 2024 - France Med | $99.99 | one-time |
| Lesser Antillas 2024 | $99.99 | one-time |
| SHOM 2024 - France Manche | $99.99 | one-time |
| SHOM 2024 - France Atlantique | $99.99 | one-time |


## Frequently asked questions

### Is Weather4D Routing free?

Weather4D Routing costs $39.99, and also offers in-app purchases.

### Is Avalon Offshore free?

Avalon Offshore costs $35.00, and also offers in-app purchases.

### Do Weather4D Routing or Avalon Offshore have ads?

Neither Weather4D Routing nor Avalon Offshore shows ads.

### Which is updated more often, Weather4D Routing or Avalon Offshore?

Weather4D Routing ships an update every 3 months, and Avalon Offshore every 3 weeks. Most recently, Weather4D Routing was updated on October 20, 2026 and Avalon Offshore on October 8, 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.*