If you're outside the US, add a country code (e.g. +44__________ for UK)
You'll get a text when it's posted and another when you hit the front page.
That's pretty much it. And it's super useful.
It's a simple way to avoid missed opportunity without chaining yourself to your analytics dashboard.
Hacker news and the default frontpage of reddit are currently watched, with more fine-grained support coming soon.
I promise not to do anything sneaky with your phone number.