Maps that work
when the internet 
doesn't.

Get Access for Your Team See What It Does →
BlocNav at a Glimpse

Offline-First Field Mapping

Drop POIs, log GPS tracks, draw coverage areas, and sync when you're back in range. No enterprise license. No failed downloads. No lost data.

BlocNav offline field mapping — live screenshot
✓ Sector complete
Active search sector
Responder path
⚠ Hazard reported
Offline mode · cached tiles Last sync 4m ago

Designed for

🔍 Search & Rescue 🌿 Environmental Survey ⚡ Utility Inspection 🚨 Disaster Response 🌾 Ranch & Land Management

Platform highlights

PWA — Any Device Works on 2G GPS Track Logging Zero Data Loss Tested in Texas field ops
Features

Everything your team needs in the field. Nothing that breaks when you get there.

🗺️

Offline Maps

Download map tiles by county. They stay on your device — no random failures, no re-downloading every time you deploy.

📍

Drop POIs Anywhere

Tap the map, add details and photos, save. Works with zero signal. Data survives app close, reboot, or dead battery.

🟦

Coverage Tracking

Draw polygons to mark sectors — to-search, active, or searched. See at a glance where your team has and hasn't been.

🔄

Conflict-Free Sync

Back in range? Tap sync. POIs, tracks, and coverage merge cleanly — no failed syncs, no orphaned records.

🛤️

GPS Track Logging

Record where your team actually went. Distance, duration, and route saved fully offline.

🚗

Driver Mode

One-tap hazard capture from a moving vehicle. Camera-first, GPS-tagged, auto-synced. No stopping, no forms.

📱

No App Store. No IT.

Send a link. Open it. Install from the browser. Your team is live in under 60 seconds on any device.

👥

Team-Ready

Everyone works from the same map. POIs, tracks, and coverage from your whole team merge after sync.

The Difference

Field mapping shouldn't require an enterprise GIS license.

BlocNav is built for teams who've tried ArcGIS Field Maps — and need something that actually works offline.

✕  Traditional tools
✓  BlocNav
Offline downloads fail randomly — even for small areas. Maps vanish from devices after days.
Download county tiles once. Integrity-verified. They stay until you clear them.
Sync fails silently. Edits get trapped on device with no recovery path.
Atomic batch sync with conflict-free merge. POIs, tracks, and coverage all make it to the server.
$1,500+/user/year. IT department required. Weeks to deploy.
Share a URL. Install the PWA. Deployed in minutes, not months.
Why BlocNav?

Slow networks are worse than no network.

Most apps treat connectivity as binary — online or offline. In the field, you're usually somewhere in between: your phone shows bars, but nothing loads.

BlocNav was designed for this "deceptive connectivity" problem. Local data is always available first, and the system never blocks your maps waiting on a network that isn't really there.

Read the full technical breakdown →

"The app shows signal, maps start to load, then everything freezes. Your team is standing there. Nothing works."

This is the scenario BlocNav was built around. Every data operation is local-first — maps, POIs, tracks, and coverage all read from device storage before touching the network.

local storage → network · never the reverse

How it Works

Up and running in four steps.

01

Open the link

Visit the URL on any phone, tablet, or laptop. Install the PWA from your browser in one tap — no app store.

02

Download your area

Select counties. Tiles download and verify automatically. Stored locally until you delete them.

03

Work offline

Drop POIs, log tracks, draw coverage. Everything saves locally — no bars required.

04

Sync when ready

Back in range? One tap. Your team's data merges into a single shared map.

Ready to test it in the field?

BlocNav is in active pilot testing with field teams in Texas. If your team works in low-connectivity environments and needs mapping that actually works offline, let's talk.

contact@blocnav.com Tell us your use case — we'll set up a walkthrough.

Tweaks