Hacker News Reader

Very cool! I think the name is a reference to the 1€ filter?

It is the opposite. As state on the website you liked: > The name "1€" is an homage to the $1 recognizer.

Where did the name $1 come from?

I believe it is a reference to the US dollar

Because this software cost about dollar to make (it sucks).

It's the other way around, says so on the page you linked