Offline household library · English + Español
A small Wi-Fi box with a solid-state drive inside. It carries an encyclopedia in English and Spanish, street-level maps, official emergency documents and your household plan. Any phone, tablet or laptop joins its Wi-Fi and reads. No cell signal, no account, no subscription.
Leaves our shop within 2 business days by UPS or FedEx, ground shipping included. Cancel any time before it ships for a full refund.
A real screen from the working software: downtown Fort Worth at street level, with outside network access blocked.
English + Español
One search box finds articles, guides and places in both languages.
Solid-state drive
An NVMe SSD holds the library, not a memory card.
Nothing leaves the box
No account, no tracking, no cloud. Your household plan stays in your own browser.
Signed and checked
Every file in an edition is hashed, the edition is signed, and the reader checks it.
Sources on the record
Each source, its license and its data date are listed inside the library.
Why it exists
Storms take down towers. Power cuts take down routers. A move, a road trip or a dead zone does it with no disaster at all.
The answers you would have searched for are the ones you can't reach: how to shut off the gas, which road leads out, how long the food in the fridge is safe, what that medical term means.
Offgrid Brainbox keeps a working copy of those answers in your house, in both of your household's languages.
What's inside
01
The complete text of English and Spanish Wikipedia, about 61 GB of articles, plus medical encyclopedias in both languages. It opens inside the same reader on any device.
Text editions: no photos. Each edition shows its date.
02
Pan and zoom like any map. Search for a town, drop a pin, save places, read coordinates and measure straight-line distance. Every map shows where its coverage ends and how old its data is.
No turn-by-turn directions: distances are straight lines, and the map says so.
03
Short cards for outages, water, food, first-aid reference and home repairs, in English and Spanish, next to official preparedness documents. Search works across all of it at once.
A card ships only after a qualified reviewer signs it. Drafts never ship as guidance.
04
Contacts, meeting places, where the shutoffs are, what to grab. It lives in your own browser, prints on paper and exports to a file you control.
It is never uploaded, because there is nowhere to upload it to.
Built and tested today
Planned next
Your unit ships with the widest map edition that has passed our checks. Founders vote on the order.
How it works
1
Use the included power supply. The box starts its library by itself.
2
The box makes its own network. Pick it on your phone like any other Wi-Fi. It does not need a router or a modem.
3
It is a normal web page in your browser. There is no app to install and no account to create.
The library opens on six practice steps. Do them once on a normal day, so the first time is not the bad day.
Prefer a laptop? The Library Drive edition is the same library on a portable SSD. Plug it into a computer and open it.
The honest comparison
| Offgrid Brainbox | Build it yourself | Offline apps on a phone | Printed binder | |
|---|---|---|---|---|
| Works with no internet | Yes | Yes, once built | Yes, until the phone is lost, locked or dead | Yes |
| Everyone in the house can use it | Any device on its Wi-Fi | If you set up the hotspot | One phone at a time | One reader at a time |
| English and Spanish search | One search across both | You wire it together | Depends on the app | No search |
| Street-level maps and place search | Included | A second project | Region by region, and downloads can expire | A few printed pages |
| Checked content | Hashed, signed, dated, sources listed | You verify each download | Varies | Whatever you printed |
| Your time | Minutes | Several evenings and a 61 GB download for the encyclopedias alone | An hour or two per phone | A weekend and a ream of paper |
| Parts cost today | From $549 | About $318 for the same parts | Free to a few dollars | $30 to $60 |
Parts cost is for a Raspberry Pi 5 (4 GB), a 1 TB NVMe SSD, an aluminium NVMe case and the official power supply at US retail on November 14, 2026. Our full parts list and the build steps are in the guides, free.
Read the build-it-yourself guideEditions
Founder's prices are for units in the first batch. Order today and it leaves our shop within 2 business days.
The library on a portable SSD, for your own computer.
Founder's price
$279$329 after the first batch
Ships after the signed Windows and macOS versions pass testing. On Windows the encyclopedia opens in the free Kiwix app.
Order this editionOr reserve without payingMost households
The Wi-Fi box. Plug it in and the whole house can read.
Founder's price
$549$649 after the first batch
Hardware testing is in progress. See the proof page for exactly what is tested.
Order this editionOr reserve without payingThe same box with twice the drive, for what comes later.
Founder's price
$749$849 after the first batch
Today's library fits on 1 TB many times over. Choose this only if you want the headroom.
Order this editionOr reserve without paying01
The founder's price
Held for units reserved in the first batch, even if part prices rise again before we build.
02
One library refresh in the first year
A newer encyclopedia and map edition when we release one.
03
A vote on the next map regions
Founders decide which states and regions we build first.
04
A printed quick-start card
English on one side, Spanish on the other. It lives with the box.
30-day return
Take 30 days. Turn off your router and your cell data for an evening and run your household through the six practice steps. If the library does not earn its place, send it back for a full refund.
One-year hardware warranty.
We build in small batches and buy parts for each batch. Raspberry Pi and SSD prices rose sharply in 2026: the 8 GB Raspberry Pi 5 went from $80 at launch to $175. The founder's price is the one we can hold for the first batch.
Storage, with the numbers
Tick what you would carry. The sizes are the ones we measured while building the library.
Your library
66.8GB
14% · 476 GB
7% · 931 GB
4% · 1863 GB
We keep 45% of the drive free on purpose. A new edition is copied next to the current one and checked before the switch, so an interrupted update cannot leave you without a library.
Proof, not promises
Most products in this space tell you what they hope is true. This is the actual state of ours on November 14, 2026.
Who it is for
Storm-country households
Hurricanes, ice storms and tornado seasons take the network down first.
Rural places and dead zones
Land, cabins and ranches where the signal was never good.
RVs, boats and long drives
A library and maps that ride along and never roam.
Bilingual families
Everything searchable in English and Spanish, side by side.
Churches, schools and groups
One box serves a room. Ask about group orders when you reserve.
From the guides
Parts and prices
A Raspberry Pi 5, a 1 TB NVMe drive, a case and a power supply cost about $318 today. Here is the full parts list with the price of each part and where we read it.
November 14, 2026
Offline Wikipedia
English Wikipedia is 49.1 GB as text and 119 GB with images. Spanish is 12.4 GB as text. Here is every size we measured, how long the download takes and how to check the file.
November 14, 2026
Build guide
The whole build in plain steps: the parts, the downloads, the Wi-Fi hotspot and the offline map, with the exact commands and seven things that broke when we built ours.
November 14, 2026
Questions
No. The library, the maps and the search all run from the drive in the box. We tested it with every outside connection blocked. You only need the internet if you choose to download a newer edition later.
Any phone, tablet or computer with Wi-Fi and a web browser. There is no app and no account.
We have not measured that on the final hardware yet, so we are not going to give you a number. It is on the test list, and the result will be published on the proof page.
The Home edition ships with a wall power supply. We are measuring power draw and battery runtime on real hardware before we publish any figure.
It is the complete text of English and Spanish Wikipedia as packaged by the Kiwix project, each with its edition date. The text editions do not include photos, which is why both languages fit in about 61 GB.
Today: Dallas–Fort Worth at street level, all of Texas at regional detail and the world at overview level. Street-level maps for the lower 48 states are planned next, then Alaska, Hawaii, Puerto Rico and the US Virgin Islands. Every map shows its own coverage boundary.
No. You can search for places, drop pins and measure straight-line distance, but there is no turn-by-turn routing, and the map tells you so.
Each edition is a complete, signed set. The 1 TB drive leaves room to copy a new edition beside the current one and check it before switching. Founder's units include one refresh in the first year.
Yes. It is stored only in your own browser, on your own device. The box has no account system and sends nothing anywhere. You can print the plan or export it to a file.
You can, and we wrote the guide. The parts cost about $318 today. What you are paying us for is the evenings of setup, the checked and signed content, the bilingual search and a person who answers when it misbehaves.
You pay in full today, on Square's payment page. Your order leaves our shop within 2 business days, by UPS or FedEx. Ground shipping is included in the price; 2-day and overnight delivery are offered on the order page. If we cannot ship in that time, we email you and you choose to wait or to get a full refund. You can cancel for a full refund any time before it ships, and return it within 30 days of delivery.
Founder's batch
No payment today. We will email you when your batch is ready to build, with the final price and the test results.