Built for five days off-grid.

Topographic sheets at hiking scale

• 0.5° vector sheets (~55 km north-to-south) stored on the microSD card. Download them on the device (Manual §06), via the Wi-Fi page, or from the Maps grid.
• One stroke, one meaning: zoom 12–16, 20 m contours with heights, cased roads, dashed trails vs tracks vs footways, streams, lakes, tree symbols, scree, cliffs, peaks with heights, camps, water sources, and trailheads.
• Fast marker window: north-up by default. As you walk, only the small window around your arrow refreshes (~143 ms), keeping battery draw minimal and the sheet still.
• Touch pan & zoom: drag across a fast dot grid to inspect ahead; press the Function button (Manual §02) to jump back to your GPS position.

Routes, elevation profiles, and GPX logs

• Planned GPX routes (Manual §08): view total distance, climb, descent, and time before starting. Show on map fits the entire route and draws it as a bold dashed line.
• Interactive elevation profile: scrub along the route with your finger to see the height at any point and remaining climb to the finish. Routes without <ele> tags are filled automatically from the map’s built-in DEM grid.
• Explicit walk recorder (Manual §07): touch-only Start, Pause, Resume, and Finish on the bottom bar so a pocket press never stops your walk. Auto-pauses after 20 minutes standing still, and safely closes the GPX file at 3% battery.
• 24-hour temperature log (Manual §10): samples the battery sensor every 10 minutes with an interactive min/max scrub graph.

Your group on the map, with zero cell coverage

• Meshtastic compatible (915 MHz LongFast): off by default in Settings → Radio. Works alongside standard Meshtastic nodes and phones (scan the on-screen QR to add your private 6-digit group channel).
• Companions on the sheet: see group members as initialed rings on your topo map; tap any ring for distance, bearing, fix age, and battery, or turn on a guide line.
• Chat, pins & SOS: send quick preset phrases or type on the keyboard, long-press the map to drop Meet / Camp / Water / Danger pins, or trigger an SOS broadcast.

240 field articles and your own books

• Built-in Survival Guide (Manual §09): 240 articles across 19 sections (first aid, hypothermia, water, shelter, knots, avalanche, signaling) with 125 1-bit diagrams and instant full-text search.
• E-paper book reader: drop .txt and .md files into /books (up to 4 MB each). Typeset in Source Serif 4 with three text sizes and persistent reading position.
• Camp utilities (Manual §10): landscape analogue Clock, packing List, and live map Legend.

One browser page for maps, tracks, books, and lists

Open File transfer (Manual §11) on the device to join your home Wi-Fi or start a standalone Krok-XXXX hotspot. Point any phone or laptop browser to the address on the screen:

How it sleeps — and what it is not

• Automatic sleep policy (Manual §14): live 1 Hz updates while you actively look or walk unlocked; quiet 30-second sampling in your pocket; deep sleep with the map left on the screen after 15 minutes still.
• Signed OTA & SD updates (Manual §12): update firmware and the survival guide over Wi-Fi or from /update/ on the SD card, with automatic rollback if a boot fails.
• What Krok is not: no turn-by-turn voice prompts, no automatic rerouting, no compass or barometer (the board has neither), and not waterproof without a case (Manual §16).