The Grid-Down Kit — Digital

What’s in the download

• The Grid-Down app. One file that runs in the browser of any phone or computer with no internet: eighteen “what’s happening” situations (earthquake, tsunami, wildfire, water rising, tornado, thunder and lightning, power out, unsafe water, severe bleeding, CPR, choking, heat, cold, gas or CO, evacuate, can’t reach family, lost outdoors, snake bite), the full guide, tools (bleach amounts, water to store, the fridge clock, find my way, shadow-stick direction, battery time, go-bag list), a private family plan and every way to reach people. It reads pages aloud with your device’s own voices.
• The Field Manual (65 pages) and every kit guide: Your First 72 Hours, The 72-Hour Atlas, and the Go-Bag, Home, Car and Family Needs kits. Day editions to print (US Letter and A4) and Night editions with glowing text for your phone.
• Emergency Now for your phone (one screen per emergency, with the steps in big type), The Prep Pack (the printable One Page for your fridge, drills and a year plan) and five phone lock screens.
• The library builder. A script for Mac and Linux that downloads the whole offline library from its original publishers onto your drive and checks each library file against the publisher’s checksum. Pick Pocket (about 180 GB, fits a 256 GB stick) or Core (about 240 GB plus your state’s topo maps, for a 1 TB drive). Windows users get the full download list.
• The Start Here guide. How to set everything up on Mac, Windows, Linux, Android and iPhone, share the library over Wi-Fi with no internet, and run the offline AI.

What the library holds

• All of English Wikipedia with images, plus a phone-size top-50,000 edition
• Medical: WikiMed, MDWiki and WikEM emergency medicine
• Public-release US Army manuals (survival, first aid, field sanitation, cold weather), FEMA’s Are You Ready? and CERT manual, the USDA canning guide and Nuclear War Survival Skills
• Expert Q&A on home repair, gardening, cooking, car repair, the outdoors and ham radio; Appropedia and energypedia for off-grid water, power and building
• An offline street map of the US, OpenStreetMap data for your state, and on Core every USGS topo sheet, elevation and water data for your state
• Small open-licensed AI models (Qwen, Apache 2.0) with llama.cpp, to run on a laptop or newer phone with no connection
• Free reader apps for Mac, Windows, Linux and Android, with their source code

Good to know

• You need your own drive and an internet connection for the one-time build (leave it running overnight). Don’t want to do that? Get the Pocket Drive and we build it for you.
• The offline AI is a small model. It’s useful for finding your way around a topic, and it makes mistakes. Check numbers and safety steps against the printed guide. It is not a doctor.
• On iPhone, the app file may open only as a preview without its tools; keep the PDF guides too.
• The library content is open-licensed by its makers (Wikipedia CC BY-SA, OpenStreetMap ODbL, US government works public domain). The kit lists every source and licence. The Grid-Down app is open source. Our guides are © SOS.city.

General preparedness information, not medical, legal or engineering advice. In an emergency, follow local officials and call 911.