It works on my machine, but is it working for my users?

Every time I shipped something, the same thought hit me a few hours later:

It works on my machine. It works in staging. But is it actually working for the people using it right now?

I had analytics. I had a green dashboard. And I still had no honest answer to that question. Users would quietly leave, a button would silently break on Safari, a page would crawl on a mid-range Android, and I'd find out days later, if at all.

That gap is what I ended up building HeronSignal to close. But before I talk about the tool, let me talk about the pain, because I think you've felt at least one version of it.

The pain, depending on who you are