This is the only submission from me. You're probably thinking of https://news.ycombinator.com/item?id=12843466 https://news.ycombinator.com/item?id=12843466.

This is the only submission from me. You're probably thinking of https://news.ycombinator.com/item?id=12843466 https://news.ycombinator.com/item?id=12843466. I cloned that app to show how to build the same thing while also respecting user privacy. And, it's open source.