A Soul Knock is BiggDate's mechanism for starting contact. To open a conversation with a match, you compose a question for them. They see your question and answer it. They then ask you a reciprocal question. Only after both sides have answered does the chat thread open and photos unlock.
The purpose of a Soul Knock is to filter out 0.5-second appearance-based decisions. On most dating apps, a swipe is a coin flip on a photo, and 'match' means almost nothing. On BiggDate, a successful Soul Knock means two people demonstrated effort and curiosity about each other before any chat began.
Soul Knocks are not paid features and do not replace messaging. After both have answered, chat works like any messaging app — but the friction is concentrated at the front of the relationship, not the back.
Compare to: Hinge's 'like a prompt + comment' mechanic, which is closer in spirit but still keeps photos visible from the start. Compare to: Bumble's 24-hour first-message rule, which addresses ghosting but not the photo-first problem.