Knock, don’t ring.
Tap, and their phone knocks — your actual rhythm, tap for tap, in real time. Keep knocking until they pick up. It feels like knuckles on wood, not a ringtone.
Don't ring. Knock.
Knock Knock
Video calls you'll actually want to make.
Tap, and their phone knocks with your rhythm. They knock back twice to open the door. No feeds, no links, no ads — just your people.
9:41knock knock
Calls
EditMR
Maya Reyes
↗Today, 8:24 PM
JK
Jordan Kim
↗Missed · 3:10 PM
AW
Alex Whitman
↗Yesterday
SP
Sam Patel
↗Mon
Calls
Knock knock. Who’s there?
Knocks ring anonymously: no name, no photo, just a door. They answer by knocking back twice — and only then find out it’s you. Answering a call hasn’t felt like this before.
Your number is your account.
No usernames, no passwords, no email. Sign in with your phone number, find the friends already on Knock Knock, and call them in two taps.
Bring everyone into the room.
Group calls stay simple: pick the people you want and start the moment. No calendar invite, no link to hunt down.
Made to feel good.
Warm eggshell and espresso instead of clinical white. Haptics on every knock, a chime when your person arrives, a soft tock when the door closes.
Open source.
The whole app — iOS, backend, this site — is on GitHub. Read the code, audit how calls and contacts are handled, file issues, send PRs. Private by default, provable by design.
github.com/viraatdas/knock-knockGo knock on
someone's door.
Free on the App Store today. Android is on the way.