KnockKnock,

When you miss someone, Knock Knock!

KnockKnock is the most natural way to reach out to your friends, you knock on their door, they will hear your knocks. If they opened your knock, you can begin talking face to face.

Knocks only live for a short period of time on your phone, and you won't be able to see who knocked you if you missed their knocks.

Becoming friends is as simple and natural as meeting each other. Simply face your phones to each other, just like you are talking to your friends face-to-face in the real world, and then you becomes friends! Not even a single tap needed.

Have fun knock knocking!