Sonar is a private messenger that works two ways at once: Bluetooth finds the people around you — even with no internet — and the open Nostr network reaches everyone else. Your phone is the only account you need.
End-to-end encrypted · your key never leaves the phone · a3f9 2c41 770e 5b2d
Two networks, one chat
Sonar routes every message automatically: Bluetooth when your friend is in range, the encrypted open internet when they are not. The bubble color tells you which — like iMessage, but for distance instead of platform.
Why Sonar
Bluetooth mesh relays messages phone-to-phone. Festivals, flights, blackouts, protests — if people are around, Sonar works.
Out of range? Messages travel over Nostr — an open relay network nobody owns. No company server sits between you and your friends.
Direct messages are end-to-end encrypted, always. Your identity is a key created on your phone — verify friends in person with a safety number.
Pay a friend
Settle a dinner across the table or send cash across the world. The payment takes the same path your message would — phone-to-phone over Bluetooth when they’re near, over the internet when they’re not. It arrives sealed; they tap to open.
Location channels
Wherever you stand, Sonar shows one “Around you” place — zoom from your block to the whole region with a single tap. Real place names, never raw coordinates, and never an endless list of empty rooms.
Everywhere you are
Built for iPhone, iPad and Mac. The same nearby radar, the same encrypted chats, the same key in your pocket — your conversations follow you, and nothing lives on a server.
Quiet, dependable privacy
There is no signup, no contact upload, no cloud backup of your conversations. And if you ever need it: triple-tap to wipe everything — key, chats, nickname — instantly.
$ accounts found: 0 · servers contacted: 0Free, open source, end-to-end encrypted. iPhone and Mac beta on TestFlight — Android alpha APK available now.
Android APK is an arm64 alpha · sideload on 64-bit phones