KnockKnock! is built for small, trusted circles: teammates, friends, and family. No meeting links, no waiting rooms just quick, direct calls that don't take up your whole screen. Mac-native one-click video calling with LiveKit low-latency streaming, secure Firebase sign-in, and customizable colours and themes. Floating call windows and 5-minute limits make every interaction spontaneous, focused, and fun perfect for quick, meaningful connections anytime.