I built an app to use a QR code as my doorbell
I didn’t have a doorbell before (multiple reasons) and my house feels unwelcoming without one. So I built a doorbell app that uses a QR code - visitors scan the QR code to ring the doorbell and I get notified on my phone. Here is an example of the QR code I have on my door. You can scan it and say hello: https://www.thebacklog.net/img/2024/10/show-hn.png This was also a great excuse to build my first app for Android and iPhone. I’d love to get some feedback before I spend more time polishing the app. Please try it out and feel free to ask me any questions! No…
I built an app to use a QR code as my doorbell launched on October 29, 2024 with 140 votes, #358 of 5,185 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
This app converts a QR code into a digital doorbell for homes without traditional doorbells. Visitors scan the code on the door to send a notification to the homeowner's phone, with no login required. Built for homeowners seeking an alternative to physical doorbells, the app works on both Android and iOS and lets visitors send audio or text messages alongside their ring.
written from the facts on this page · September 2026
From the sources
A doorbell for every entrance
In the maker’s words, at launch
I didn’t have a doorbell before (multiple reasons) and my house feels unwelcoming without one. So I built a doorbell app that uses a QR code - visitors scan the QR code to ring the doorbell and I get notified on my phone. Here is an example of the QR code I have on my door. You can scan it and say hello…
Does a similar job
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Smart QR DoorbellJul 2026 · play.google.com · ▲3Turn your smartphone into a smart doorbell with QR code.
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