Knock is the little ritual for big moments. Tap three times and send good fortune — with your own voice — to family and friends anywhere in the world.
Free to start. Invitation only — ask a friend to knock you in.
The old superstition, made new
Before a big exam. Before the doctor calls back. Before the plane takes off. We reach for the nearest table and knock — for luck, for love, for strength.
Knock takes that tiny act of hope and points it at a person. When you knock, it lands on their phone — a warm tap, a familiar sound, and your voice saying exactly what they need to hear. Good fortune, delivered.
How it works
No feeds, no likes, no noise. Just you, your people, and a knock when it counts.
Pick a person, tap the big button three times. They feel it arrive — a gentle knock-knock-knock on their phone, wherever they are.
Record a short voice knock — "You've got this, sweetheart" — and it plays on their end. Save favorites and pick the right voice for the right person.
Knock someone every day and the streak grows. It's the easiest way to say "thinking of you" without saying a word.
Big interview at 9 a.m. Tuesday? Schedule a knock so your luck arrives right on time — even if you're asleep on the other side of the world.
Make a circle for the whole family or friend group. When someone has a big moment, everyone piles on the knocks together.
Every knock and every moment lives in a timeline you can revisit — the night before the game, the morning of the results, all of it.
Real moments
A knock is small on purpose. That's why it fits everywhere love does.
Every Friday before her grandson's basketball game, Rosa sends three knocks from her armchair two states away. Her voice plays in the locker room: "Play brave, mijo." He's never missed a Friday knock — and swears he plays better because of it.
"I can't be in the bleachers anymore. But I can still be there before tip-off."
Maya moved to Lisbon; her best friend stayed in Seattle. Calls are hard to schedule, but a knock takes three seconds. Their streak is 214 days and counting — a morning knock over coffee on one end, a goodnight knock on the other.
"It's not a text. It's a little 'I've got you' that crosses the ocean."
Knock is invitation only. To join, a friend or family member sends you an invite — or simply knocks you first.
That's the charm: everyone inside was brought in by someone who loves them. Ask your luckiest friend for an invite, or download the app and be ready when the knock comes.
Download Knock, record your voice, and send your first three taps of good fortune today.
Download on the App StoreiPhone today. Android is on the way.