# LuckGrib vs Marine Instruments

The clearest difference is price: LuckGrib at Free against Marine Instruments's $7.99. LuckGrib also leads on update cadence (every 2 months vs every 7 months) and iOS requirement (18.4 vs 26.0). Marine Instruments's advantage is in-app purchases (none vs 6). On ads and device support there is nothing between them.

LuckGrib is free to download; Marine Instruments costs $7.99 up front. LuckGrib sells 6 one-off in-app purchases. Marine Instruments asks for nothing beyond the download.

LuckGrib ships an update every 2 months, Marine Instruments every 7 months. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | LuckGrib | Marine Instruments |
| --- | --- | --- |
| Price | **Free** | $7.99 |
| Rating | **[4.9 (343 ratings)](https://appshunter.io/ios/app/luckgrib/id1318450117/reviews)** | — |
| Number of ratings | **343** | — |
| Positive reviews | 92.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 7 months |
| Monetization | Free with in-app purchases | — |
| Size | 173 MB | 1 MB |
| Requires iOS | **18.4** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Craig McPheeters](https://appshunter.io/developer/590365129) | [Stolk.cc](https://appshunter.io/developer/313529099) |

## What reviewers say

### 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


### Marine Instruments

[App page](https://appshunter.io/ios/app/marine-instruments/id6756301590)

**In-app purchases:** none


## Frequently asked questions

### Is LuckGrib free?

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

### Is Marine Instruments free?

Marine Instruments costs $7.99, with no in-app purchases.

### Do LuckGrib or Marine Instruments have ads?

Neither LuckGrib nor Marine Instruments shows ads.

### Which is updated more often, LuckGrib or Marine Instruments?

LuckGrib ships an update every 2 months, and Marine Instruments every 7 months. Most recently, LuckGrib was updated on November 4, 2026 and Marine Instruments 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.*