Offline-First Apps

Software that works without internet — encrypted local messaging, offline maps, and situational awareness tools.

Briar

Encrypted P2P messaging. No server, no internet required.

rangeBluetooth (~10m) / WiFi Direct (~100m)

bandwidthMedium

costFree

licenseNone

powerLow

Open-source encrypted messaging that works over Bluetooth, WiFi Direct, or Tor. No phone number or email required. Messages go directly between devices — no server. When internet is available, routes through Tor for anonymity.

Best for: Secure local messaging when internet is unavailable; privacy-sensitive situations

Limits: Short range (Bluetooth/WiFi Direct); phone battery is the constraint; Android only for full P2P

briarproject.org

OsmAnd / Maps.me

Full offline maps. Pre-download before the emergency.

rangeN/A

bandwidthN/A

costFree

licenseNone

powerLow

OpenStreetMap-based offline maps with turn-by-turn navigation. Download entire country or regional map files. OsmAnd is more detailed; Maps.me is simpler. Both run fully offline.

Best for: Navigation when cellular data is unavailable; pre-downloaded regional maps

Limits: Large download size for full regions; must be downloaded before the emergency

osmand.net maps.me

How do apps compare on resilience axes?

Meshtastic

Signal

Briar

Scores are 0–5 (higher = better). "Works under censorship" reflects resistance to blocking, not guaranteed access. Meshtastic requires dedicated LoRa hardware.

Hover or tap to see scores. Scores represent the editorial assessment of this guide — see the offline-first apps technology page for detailed comparisons.

← Mesh Networks

Portable Power →