Fancy doing something?
Coffee?You don't have to reply: if I don't hear back in 3 days, I'll let this invitation go, and that's okay.
Pick a card, send the link. They answer in one tap, no account needed.
Nothing gets sent. This is exactly what the other person sees.
You don't have to reply: if I don't hear back in 3 days, I'll let this invitation go, and that's okay.
Pick a card, send the link on WhatsApp or by text, and they answer in one tap.
The message is already written. Add their first name and tweak it if you like.
On WhatsApp, by text, or anywhere you like. Knock Knock isn't a messaging app.
No account, no app. Every answer is the same size, including the no.
35 cards in three families, each with a ready-made message and ready-made answers. 17 are free forever.
Get back in touch after a quiet spell.
They open the link in their browser and answer in one tap. Or they don't.
Five rules behind every card and every screen.
Every card says what it is in big letters: an invite, a favour, a comeback, a thank-you. Nobody has to guess what you meant.
The “no” is the same size, shape and dignity as the “yes”. It's never red, and it never sets off a sad animation.
For cards that expect an answer, you pick a window. When it runs out, the invitation gently closes, without ever calling the silence a refusal.
No step kicks off on its own. Mirror questions need a yes from each side, and a decline never says who declined.
Knock Knock is here to open a door, not to keep you in the app. No counters, no streaks, no nudges to come back.
Yes. 17 cards are free forever. More cards unlock by pack in the app, with a one-time payment.
No. You open the link in your browser and answer in one tap. No account, no app, no email address.
No. Knock Knock never shows whether a card was opened. The sender only sees your answer, when it arrives.
When you send it, you pick a window: 3 days, a week, or no deadline. They read the matching line at the bottom of their card. When it runs out, the invitation gently closes. Knock Knock never follows up, and never presents silence as a no.