Peer-to-peer mesh communication
No signal?
Still works.
ChirpChirp connects iPhones directly over Bluetooth and Wi-Fi Direct. No cell towers. No internet. No accounts. Press the button and talk.
Download for iPhoneHow it works
Three steps. Zero infrastructure.
Open the app
No sign-up, no account, no phone number. Pick a callsign and you're on the mesh.
Press and hold
The PTT button transmits your voice to every device on your channel. Release to listen.
Messages relay
Out of range? Your signal hops through other phones. Five devices cover a kilometer.
Capabilities
Everything you need. Nothing you don't.
Push-to-Talk
Crystal-clear Opus audio at 24 kbps. Hold the button, talk. Everyone on your channel hears you instantly.
Mesh Relay
Every phone is a relay node. Messages hop device-to-device with automatic deduplication and TTL-based routing.
Live Translation
Speak in your language. On-device recognition and translation deliver subtitles in theirs. No internet needed.
End-to-End Encrypted
AES-256-GCM on every channel. Ed25519 device identity. Zero servers, zero accounts, zero data collection.
Emergency SOS
One-tap beacon broadcasts your GPS coordinates across the entire mesh at maximum relay range.
Offline Maps
Share live locations. Download map regions. See where your group moved, even without signal.
Under the hood
Built for
When it matters most.
Backcountry
No towers for miles. Your group stays connected across ridgelines and valleys.
Emergencies
Infrastructure goes down. ChirpChirp doesn't. SOS beacons broadcast until help arrives.
Crowded events
80,000 people overwhelm cell towers. Mesh networks get stronger with more devices.
Travel abroad
No SIM, no roaming. Communicate with your group in any country, any language.
The network is the people.
Every phone that installs ChirpChirp extends the mesh for everyone else. No infrastructure required.
Get ChirpChirp