Hear a familiar voice. Even off the grid.

Choose a live call for a familiar conversation where you can talk and listen at the same time. Choose a mesh call to hold to talk and release to listen, like a walkie-talkie.

Both start from a one-to-one chat. Knit suggests the kind that suits your connection, and you can always choose the other.

Nearby phones can create their own Wi-Fi Direct connection for a live call, with no Internet needed. Further apart, calls use a shared Wi-Fi network or the Internet.

For Internet calls, a relay you both use handles ringing. Your audio travels directly between your phones when possible, or through a TURN server that a relay offers.

Find a friend in a crowd or check in along a trail. Mesh calls stream your voice over Bluetooth and Wi-Fi Aware, passing through up to three other Knit phones to reach someone beyond your phone's range.

Hold to talk, then release for their reply. Audio starts playing as it arrives, about a second behind you between neighbouring phones, with more delay for each phone along the way. No cell signal or Internet needed when the mesh connects you.

Knit saves no call audio. Mesh calls stream as you speak, skipping lost audio rather than saving it for later. Only a short call record stays in your chat.

If someone is out of reach and you want to leave a message, send a voice note instead.

An optional, compatible Internet relay gives mesh calls another route when the radio path is unavailable or unreliable. It forwards audio as it arrives and stores none of it. When the radio path improves, Knit returns to using it alone.

Both kinds of call are end-to-end encrypted. Mesh calls use the same encryption as your direct messages. Live calls establish their own keys and verify them against your Knit identities. Phones and servers along the route cannot hear the conversation.

Both kinds of call have forward secrecy, too.

Connection details can still be visible. Direct live calls reveal your IP address to the other person. Relay all calls, in Settings, keeps that address from them by sending every live call through a TURN server, which sees both addresses instead. It works while a relay you use offers one.