Tape a QR code beside your door and anyone with a phone can ring you from it. No wiring, no drilling, no landlord to ask, and nothing for them to install. A camera on the wall watches your street all day. Tapknock captures nothing until somebody knocks.
A blue strip across the top. Reads as a label from the corridor, so a courier sees the name before he knocks.
Setup
The app produces one A4 sheet with cut lines. That sheet is the entire installation.
One page, sized and cut-lined for your door. Any printer, any paper.
Nothing to drill, nothing to wire, nothing to charge. It comes off with the tape when you move out.
It rings like a phone call, showing who it is and whether they are really at your door, even with the app closed.
The first thing they see
A driver paid per drop won’t scan a code to have a conversation. He’ll scan it to find out which gate to use. So the first thing anyone sees is one line you wrote, before the ring button exists at all.
Note from the resident
Parcels → security desk, Block B
Note from the resident
Baby asleep 1–4 pm. Leave a message instead.
Note from the resident
Swiggy: gate code 4402, then 3B
Note from the resident
Shop shut today. Ring only if it’s urgent.
What it costs
Not only in rupees.
A smart doorbell
₹6,000–15,000
Tapknock
₹0 or ~₹150 for an NFC card
Questions
No. Their camera app opens their browser and that is the whole thing. No app, no account, no sign-up.
Never. Your camera is not hidden or muted; it is never opened. You see and hear them; they only hear you, and they are told so three times before it happens.
They see the note you left for that case, then can record fifteen seconds or type a message. It waits for you in the ring log.
Rotate it: one tap and a confirm. The code on your door stops working immediately. Print the new one.
Xiaomi, Oppo, Vivo and Realme all kill background apps. Setup names the exact battery settings for your handset, then sends a test ring so you hear it for yourself before you trust it.
Printing is free and always will be. The paid things are physical: pre-printed NFC cards and weatherproof plates, and a building plan for gates with many flats behind one entrance.
That is the whole difference, and it is not a setting you could switch off by accident. It is how the thing is built.
Android, free. No face recognition, no biometrics, no video that ever reaches a server, and nothing fed into another product.
Beta
The listing is part-way through publishing. You do not have to wait for it: enrol below and a download link is emailed to you straight away. The link works for fifteen minutes.