# Avalon Offshore vs Marées

The clearest difference is review sentiment: Avalon Offshore at 75% against Marées's 6%. Marées's advantage is price ($1.99 vs $35.00) and in-app purchases (none vs 21). On update cadence, ads, device support and iOS requirement there is nothing between them.

Avalon Offshore costs $35.00 and Marées $1.99 up front. Avalon Offshore sells 21 in-app purchases, starting at $39.99 per year. Marées asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Avalon Offshore | Marées |
| --- | --- | --- |
| Price | $35.00 | **$1.99** |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/marees/id1636112325/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **75.0% of reviews** | 6.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 66 MB | 54 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Avalon Navigation Systems](https://appshunter.io/developer/1802181177) | [Christian Guine](https://appshunter.io/developer/1636112507) |

## What reviewers say

### 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 |


### Marées

[App page](https://appshunter.io/ios/app/marees/id1636112325)

Provides tide schedules, heights, and coefficients for over 150 French ports and some British ports. It operates autonomously, requiring internet only for updates and maps, and does not use geolocation data outside the app.

**Highlights:** Tide schedules for 150+ French ports, Tide data for British ports, Harmonic constants from Previ Mer, Autonomous operation, Customizable tide height thresholds, Local time display (summer/winter)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Avalon Offshore free?

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

### Is Marées free?

Marées costs $1.99, with no in-app purchases.

### Do Avalon Offshore or Marées have ads?

Neither Avalon Offshore nor Marées shows ads.

### Which is updated more often, Avalon Offshore or Marées?

Avalon Offshore ships an update every 3 weeks, and Marées every 3 weeks. Most recently, Avalon Offshore was updated on October 29, 2026 and Marées on October 30, 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.*