# reChain Grib — GRIB forecasts via InReach

> GRIB forecasts via InReach (iPhone/iPad app by Jean-Charles Levenne.)

- Source: https://appshunter.io/ios/app/rechain-grib/id6755486282 (this page in markdown: same URL + `.md`)
- Developer: [Jean-Charles Levenne](https://appshunter.io/developer/1516809656)
- Category: Utilities, Weather
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.6 · 10 MB
- Languages: English
- Released: 2025-11-30
- Data updated: 2026-06-21
- User reviews in markdown: https://appshunter.io/ios/app/rechain-grib/id6755486282/reviews.md

## What is reChain Grib?

reChain Grib is the simplest way to request, decode, and view GRIB weather files when you’re offshore with a Garmin inReach device.
Built for skippers who need reliable, lightweight, fully offline weather tools, it keeps you informed even far beyond any network.

→ Generate GRIB Requests
Create precise GRIB requests (wind, pressure, waves…) with a clean, intuitive interface.
Copy the request and send it via your inReach to a dedicated email—no internet required.

→ Decode GRIB Chunks
Paste the GRIB message chunks received by your inReach.
reChain Grib automatically decodes them into a downloadable GRIB file.

→ View GRIB Forecasts (Built‑in Viewer)
Open the GRIB directly inside the app and explore the forecast timeline with a clean, lightweight viewer designed for offshore use.

→ Built for Offshore Use
• 100% offline
• Extremely lightweight

→ Why reChain Grib?
Because offshore weather access should be simple, reliable, and available anywhere.
Whether you’re crossing an ocean or sailing along a remote coast, reChain Grib gives you the essential tools to request and view weather whenever you need it.

→ Notes
Requires a Garmin inReach device for sending/receiving messages.
reChain Grib is not affiliated with Garmin.
Terms of Use: https://www.jcskipper.com/rechain/rechain_terms.html

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| reChain Premium | $8.99 | per month |



## Version history (last 5 releases)

### 1.7 — 2026-06-07

Increase GRIB max resolution from 0,5° to 0,25°

### 1.5 — 2026-03-13

Added Pressure and Waves parameters

### 1.4 — 2026-02-18

_ Premium activation code instructions more explicite,
_ updated messages estimation calculation,
_ update instructions app,
_ accepted extension .grb in gribviewer.

### 1.3 — 2026-02-08

Added ECMWF model for Grib requests
Some bugs fixed

### 1.2 — 2026-01-31

Added simple Grib Viewer
Many bugs fixed

## More apps by Jean-Charles Levenne

- [JveuxDuSoleil](https://appshunter.io/ios/app/jveuxdusoleil/id1516809657)
- [Inreach Grib](https://appshunter.io/ios/app/inreach-grib/id6743724774)

All apps by Jean-Charles Levenne: https://appshunter.io/developer/1516809656

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-21.*