I launched PR Scheduler on ProductHunt - https://www.producthunt.com/posts/pr-scheduler
The launch went fairly well. I was in the top 5 for a while but wasn't able to stay there the whole day. It's okay though, I didn't think it was likely to be in the top 5 because it's a fairly niche development tool.
From the Launch I got about 10 new signups. A few users also scheduled PRs which is a great feeling.