FAQ.

Short, blunt, no marketing voice.

Do we have to stop using WhatsApp?: No. The WhatsApp group stays exactly as it is. Knock doesn't replace it. It replaces its operational use.
What if only 20 people install it?: That's enough. The moment the committee posts a first announcement, everyone who installed has already received something worth having. No network effect required: one committee member is enough to make it useful.
What if our building has no committee?: Right now, Knock works through an active committee, which invites the building and approves setup. Without a committee, there's no way to start.
Can we export our data and leave?: Yes. Deletion and export cover every module in one request, and you can turn the service off at any time.
Does it open the gate?: No. Nothing in the app controls a gate or physical entry to the building.
Do residents pay?: No. Residents never pay for Knock, ever.
Is there a chat?: No, on purpose. Comments underneath a post are exactly what turns a group unusable. No comments means nobody argues at midnight, and nobody has to scroll thirty replies to find the actual information.