Unblock
Broadcast when the net goes dark. Off-grid, signed, no account.
Unblock is a censorship-resistant broadcast messaging app built for environments where the internet is shut down, jammed, or surveilled. It creates a phone-to-phone mesh network using Bluetooth, Wi-Fi Direct, and optional LoRa radio — no infrastructure required.
BLE Mesh Relay
Messages hop phone-to-phone over Bluetooth Low Energy. No cell tower, no Wi-Fi router, no internet required.
Wi-Fi Direct & LoRa
High-throughput local transfers via Wi-Fi Direct. Long-range relay via LoRa radio when paired with compatible hardware.
Cryptographic Integrity
Every message is signed with Ed25519 and sealed with XChaCha20-Poly1305. Forgery is mathematically impossible.
Zero Data Collection
No account, no phone number, no analytics, no crash reporting. We have no backend — there is nowhere for your data to go.
Store & Forward
Messages queue locally when all bands are jammed or out of range. They flush automatically when any transport recovers.
Panic Wipe
One button irreversibly destroys your identity, all channels, all messages, and the outbox. The app restarts as if freshly installed.
PIN-Protected Identity
Your signing key is encrypted with a PIN-derived key (Argon2id). Without the PIN, the key material is unreadable.
Nostr Bridge (Optional)
Connect to Nostr relays over the internet when available. Encrypted frames traverse the relay — operators cannot read content.
Who It's For
- Protests & civil unrest — communicate when authorities shut down mobile networks.
- Journalists & field teams — verify sources with cryptographic signatures, even offline.
- Natural disasters — coordinate when infrastructure is destroyed.
- Remote areas — stay connected where there is no coverage.
Get Unblock
Available on Android. Coming soon to iOS.