Fingerdoor is a real-time anonymous response platform that requires no sign-up—just enter a 6-digit code and participate instantly. It delivers truly anonymous participation, allowing people to respond honestly without hesitation. You can save and reuse questions by building your own question library, and use it like an OMR sheet for structured problem-solving. Perfect for lectures, meetings, conferences, live streams, and town halls. Share 6 digits → get instant anonymous feedback.