Share expenses with one partner using WhatsApp. Send /pair <phone> with the invitee's phone number (digits only), or share their contact card in chat. They receive a DM asking to accept or decline.

The invitee replies /accept or /decline. Pending requests expire after 24 hours.

Each user can have one active connection. You cannot pair with yourself or invite someone who is already connected elsewhere.

Either party can end the connection with /unpair. Shared totals in reports stop once the connection is removed.