A text is fine. A knock is better.

Pick a card, send the link. They answer in one tap, no account needed.

  • App Storecoming soon
  • Google Play
Try it

A real card. Tap an answer.

Nothing gets sent. This is exactly what the other person sees.

AskFrom Camille

Fancy doing something?

Coffee?

If it's a no, I promise I won't take it personally.

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.

How it works

Three steps, then it's their move.

Pick a card, send the link on WhatsApp or by text, and they answer in one tap.

  1. Pick a card

    The message is already written. Add their first name and tweak it if you like.

  2. Send the link

    On WhatsApp, by text, or anywhere you like. Knock Knock isn't a messaging app.

  3. They answer in one tap

    No account, no app. Every answer is the same size, including the no.

The cards

Ask, come back, say it.

35 cards in three families, each with a ready-made message and ready-made answers. 17 are free forever.

Someone standing in a wide-open doorway waves, holding a phone in the other hand.
For the person receiving it

No account. No app. Not a penny.

They open the link in their browser and answer in one tap. Or they don't.

  • No sign-up, no email, no phone number.
  • Always free, and never offered anything to buy.
  • Every answer is the same size. Saying no costs nothing.
  • Nobody knows whether they opened the card.
  • Discreet one-tap “Block” and “Report” links.
Our principles

The things that won't change.

Five rules behind every card and every screen.

  1. Intention first

    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.

  2. No is free

    The “no” is the same size, shape and dignity as the “yes”. It's never red, and it never sets off a sad animation.

  3. Silence isn't a no

    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.

  4. Nothing moves without both of you

    No step kicks off on its own. Mirror questions need a yes from each side, and a decline never says who declined.

  5. Success is when you actually talk

    Knock Knock is here to open a door, not to keep you in the app. No counters, no streaks, no nudges to come back.

Read more
Questions

What people ask us

Is Knock Knock free?

Yes. 17 cards are free forever. More cards unlock by pack in the app, with a one-time payment.

Do I need an account to reply?

No. You open the link in your browser and answer in one tap. No account, no app, no email address.

Will the sender know I opened their card?

No. Knock Knock never shows whether a card was opened. The sender only sees your answer, when it arrives.

What if they don't reply?

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.

All questions →

A plan, an invite, a thank-you?

Pick a card. The message is already written.

  • App Storecoming soon
  • Google Play

Free for the person receiving it, no account or app.