# SailFlow vs LuckGrib

The clearest difference is update cadence: SailFlow at every 3 weeks against LuckGrib's every 2 months. SailFlow also leads on ratings volume (5.8K vs 338) and chart position (#41 vs unranked). LuckGrib's advantage is rating (4.9 vs 4.7) and review sentiment (93% vs 84%). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. SailFlow sells 10 in-app purchases, starting at $3.99 per month and LuckGrib sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

LuckGrib holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: SailFlow has 5.8K ratings behind it against 338, so its average is the more settled of the two. Written reviews point the same way: 84% of SailFlow's written reviews are positive against 93% of LuckGrib's.

SailFlow ships an update every 3 weeks, LuckGrib every 2 months. Both last shipped on October 17, 2026.

## The numbers

| Metric | SailFlow | LuckGrib |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (5.8K ratings)](https://appshunter.io/ios/app/sailflow-sailing-forecasts/id555309964/reviews) | **[4.9 (338 ratings)](https://appshunter.io/ios/app/luckgrib/id1318450117/reviews)** |
| Number of ratings | **5.8K** | 338 |
| Positive reviews | 84.1% of reviews | **92.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#41** | — |
| Size | 137 MB | 173 MB |
| Requires iOS | **15.0** | 18.4 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [WeatherFlow](https://appshunter.io/developer/317992028) | [Craig McPheeters](https://appshunter.io/developer/590365129) |

## What reviewers say

### SailFlow

[App page](https://appshunter.io/ios/app/sailflow-sailing-forecasts/id555309964)

**Currently charting:** #41 Top Grossing · Weather, #200 Top Free · Weather (US App Store)

Get hyper-accurate, real-time marine weather forecasts and live wind reports. This app uses proprietary weather systems and integrates public data for detailed wind, wave, tide, and radar information. Customize alerts and track your favorite sailing spots.

**Highlights:** Proprietary Tempest Weather Systems, Live wind and current station reports, AI-enhanced Nearcast forecasting, Radar, satellite, and precipitation maps, Tides charts and wave height, Customizable wind notifications, Nautical charts

**Features:** macOS Compatibility, Siri integration, Apple Watch app, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus | $3.99 | per month |
| Plus | $5.49 | per month |
| Gold | $14.99 | per month |
| Pro | $14.99 | per month |
| Pro - Pay As You Go (auto-renewing) | $19.99 | per month |
| Gold | $21.99 | per month |
| Plus | $44.99 | per year |
| Plus | $44.99 | per year |
| Pro | $119.99 | per year |
| Gold | $179.99 | per year |

**What reviewers like**

- 🚀 Easy to navigate
- 🚀 Accurate wind forecasts
- 🚀 Helpful for planning
- 🚀 Great data and graphics
- 🚀 Reliable and trustworthy

**What reviewers complain about**

- 🐛 Occasional inaccurate forecasts
- 🐛 Crashes or freezes
- 💰 Expensive subscription
- 🔍 Difficult to find specific locations
- 🔍 Confusing interface at times

**Reported bugs**

- Recent update caused app to crash
- Favorites list not working properly
- Wind direction arrow pointing incorrectly

**Requested features**

- Add more local weather stations
- Improve map and location search
- Provide more forecast models
- Add support for Apple Watch
- Fix wind direction arrow issue


### LuckGrib

[App page](https://appshunter.io/ios/app/luckgrib/id1318450117)

This app provides advanced weather data visualization, downloading, and routing for sailors and weather enthusiasts. It offers access to a wide range of global and high-resolution weather and ocean models, with features for optimizing routes and analyzing complex weather parameters. Remote access via satellite is also supported.

**Highlights:** GRIB file reader, viewer, and downloader, Advanced weather routing and route analysis, Satellite data access, High-resolution global and regional weather models, Ocean current models, Detailed weather parameter analysis

**Features:** Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 14-day Trial | Free | one-time |
| 14 day trial of Offshore Data | Free | one-time |
| 14 day Weather Routing trial | Free | one-time |
| LuckGrib weather data access | $29.99 | one-time |
| Premium Offshore Data access | $59.99 | one-time |
| Weather Routing access | $59.99 | one-time |

**What reviewers like**

- 🚀 Excellent weather forecasting and routing
- 👍 Intuitive and user-friendly interface
- 💡 Wide range of weather models and data sources
- 🚢 Tailored for sailors and offshore navigation
- 💰 One-time purchase, no subscription fees

**What reviewers complain about**

- 🐛 Occasional issues with GRIB file downloads
- ⚠️ Steep learning curve for some features
- 🔍 Lack of support for some boat types (e.g., catamarans)

**Reported bugs**

- Reported issues with 'no wind data for start time'
- Occasional app crashes or freezes

**Requested features**

- Integration with boat instruments and data logging
- More advanced routing options and customization
- Improved support for regional weather models


## Frequently asked questions

### Is SailFlow free?

SailFlow is free to download, with in-app purchases available.

### Is LuckGrib free?

LuckGrib is free to download, with in-app purchases available.

### Which has better reviews, SailFlow or LuckGrib?

LuckGrib is rated higher. SailFlow averages 4.7 out of 5 from 5.8K ratings, while LuckGrib averages 4.9 from 338 ratings.

### Do SailFlow or LuckGrib have ads?

Neither SailFlow nor LuckGrib shows ads.

### Which is updated more often, SailFlow or LuckGrib?

SailFlow ships an update every 3 weeks, and LuckGrib every 2 months. Most recently, SailFlow was updated on October 17, 2026 and LuckGrib on October 17, 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.*