If you have buffer, you'll see the "add to buffer" on HN itself. Since what you built is so similar to buffer and given Buffer's popularity, was wondering if there's some more info beyond a buffer like app. My comment is somewhat snarky, but I assume if it's on HN, there's a good reason for it to be there.
Not saying you shouldn't build things that already exist, just that generally when someone builds something that already exists there are other reasons for building it. Having had the whole code reuse thing bashed into my head, I typically have to have a good reason for reinventing the wheel.