It's... totally a different thing. Did you even read the website?

Why yes, yes I did. Thank you for asking.

This is a way of tracking tasks completion. It appears to have much less structure than even a straightforward tool like Trello. Perhaps my question would have been better phrased as: What value does this provide over a tool like Trello or Basecamp?

It's a daily, high-level summary of what your team got done in a given day, prompted by and delivered to your inbox

It's also easy to look up completed tasks in the web app.