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Screenshots

  • reChain Grib screenshot 1
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About 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

What’s new

Version 1.8 · Updated October 2, 2026

reChain Grib 1.8 is a big update, built for offshore use. • Offline world map: coastlines, countries and labels now work with no network at all. • More reliable decoder: messages are saved while you wait for the full GRIB, several messages can be pasted at once, and a progress bar shows which ones are still missing. • Decode & View: open the GRIB on the map in one tap. • GRIB2: export your files as GRIB1 or GRIB2, and open GRIB2 files in the viewer. • Clearer wind map: color scale legend, tap anywhere to read wind speed and direction, isobars every 2 hPa. • Requester: your area and settings are remembered, and the message estimate is more accurate. • The app is now available in French. • Lower battery use and many bug fixes.

App privacy

The developer, Jean-Charles Levenne, reported these privacy practices to Apple.

Data Linked to You

The following data, which may be collected and linked to your identity, may be used for the following purposes:

  • Purchases: Purchase History

Used for: App Functionality

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

  • Identifiers: User ID

Used for: App Functionality

Alternatives to reChain Grib

Looking for apps like reChain Grib? Here are 6 similar apps on the App Store. The highest rated is Pilot Tools (1.0/5), and 5 of the 6 are free to download.

reChain Grib vs. alternatives
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