PREPD — OffGridNode

Built for the Field

Every component chosen for portability, durability, and ultra-low power draw. No fans, no moving parts, no fragile bits.

4-Core ARM

Processor

Raspberry Pi Zero 2 W — quad-core Cortex-A53 @ 1 GHz. Passively cooled by the aluminum enclosure.

256 GB

Purpose-Selected Storage

We hand-pick brand-name microSD cards specifically for PREPD’s workload — optimized for long-term data retention, not camera speed. Your emergency knowledge stays intact for years.

CNC Aluminum

Enclosure

Precision-machined case that doubles as a passive heatsink. Laser-engraved. No plastic.

5 Devices

Concurrent Connections

2.4 GHz 802.11 b/g/n access point. Connect any phone, tablet, or laptop — no app required.

USB-C

Power Input

Runs for days on a standard power bank. Draws less power than a phone charger.

Read-Only

Protected Content

Pre-loaded knowledge lives on a read-only partition — no corruption, no wear, no degradation. A separate writable area lets you add your own files and use the Secure Vault.

What Ships on PREPD

59 GB of Curated Knowledge

Everything below ships pre-loaded on every PREPD. No account, no internet required. Yours forever. Optional annual content updates available.

🌍

Maps — North America

Full OpenStreetMap data for the US, Canada, and Mexico. Street-level detail, offline search, topographic overlays. No cell signal needed.

30 GB

📚

Wikipedia — Curated Collection

7.5 GB curated subset of the English Wikipedia — the highest-quality articles with images, fully searchable offline.

7.5 GB

💊

Medical & First Aid

MDWiki medical encyclopedia, WikEM emergency medicine, and field medicine references. Drug interactions, procedures, and triage guides.

2.2 GB

📖

Wikibooks

Practical how-to guides covering engineering, science, computing, cooking, languages, and more. Community-written, peer-reviewed.

2.9 GB

🔧

Sustainability & Off-Grid

Appropedia — the sustainability wiki. Water purification, appropriate technology, permaculture, renewable energy, and shelter design.

555 MB

⛩

Post-Disaster Recovery

Disaster response playbooks, infrastructure recovery guides, and community resilience resources for when it matters most.

615 MB

✈

Travel & World Intel

Wikivoyage travel guides and CIA World Factbook — country profiles, safety advisories, demographics, and infrastructure data.

1.5 GB

🛠

DIY, Repair & Practical Skills

Stack Exchange archives for home improvement, mechanics, woodworking, bicycles, homebrewing, gardening, and more.

2.9 GB

🌱

Science & Nature

PhET interactive science simulations, earth science Q&A, sustainability references, and species databases.

1.7 GB

📖

Literature & Reference

Project Gutenberg classics — tens of thousands of public-domain books spanning fiction, science, philosophy, and field references.

6.8 GB

256 GB Storage Breakdown

~80 GB free for add-ons and future content packs

Core

Maps

185 GB Free

System (15 GB) Core Content (26 GB) Maps (30 GB) Free Space (185 GB)

✚ Optional Add-On Packs

Expand your library with free downloadable content packs — Khan Academy lessons, TED talks, Crash Course videos, cooking guides, and more. Download once via the companion app, keep forever.

Why Storage Type Matters

Not all SD cards are created equal. We chose ours for data retention, not speed benchmarks.

What Is Bit-Rot?

Flash memory stores data as tiny electrical charges. Over months and years, those charges leak — silently flipping bits and corrupting files. This is called bit-rot, and it’s the #1 cause of data loss on SD-card-based devices left in storage.

Speed Cards Are the Wrong Tool

Cards like the SanDisk Extreme are built for cameras — optimized for fast burst writes you’ll never use on a device that serves static content over WiFi. That speed premium adds cost but zero value to PREPD. You shouldn’t pay for features you don’t need.

Selected for This Job

We choose specific brand-name cards with strong error correction and reliable flash — designed for the exact workload PREPD demands. Pre-loaded content is written once at the factory and protected by a read-only partition, while a separate writable area gives you room for your own files and the encrypted Secure Vault.

Read-Only Where It Counts

PREPD’s OS and pre-loaded content lock down after setup — no writes means no wear on the data that matters most. A separate writable partition handles your personal files, the Secure Vault, and content updates without touching the protected knowledge base.

You Pay for What Matters

No premium speed-class markups. No cheap bulk flash that won’t last. We invest in exactly the right card for the job — reliable data retention at a fair price. Smart engineering, not overspending.

The Difference in Practice

Other offline hotspots ship with whatever card is fastest on the shelf. PREPD ships with storage chosen specifically for this workload. You know you’ve got the best tool for the job.

One Device. Many Missions.

PREPD was designed for people who need reliable, private access to knowledge — wherever they are.

⛰

Backcountry & Trail

Offline maps, plant identification, knot references, survival guides, and first aid — no cell signal required.

🏠

Off-Grid Homestead

Repair guides, gardening, water purification, energy references, and practical how-tos for self-sufficient living.

🚚

Emergency Go-Bag

Medical references, disaster recovery guides, maps, and survival manuals. Runs on a power bank for days.

🎓

Field Education

Wikipedia, textbooks, science simulations, and reference libraries for remote schools, camps, or volunteer programs.

⚓

Marine & Sailing

Coastal charts, weather references, knot guides, and emergency procedures — carried aboard in a waterproof pouch.

🔒

Privacy-Conscious Users

No tracking, no telemetry, no accounts. Research anything without leaving a digital footprint.

PREPDPocket Ready Emergency Preparedness Device