I can't find discussion on HN about this project. But as I remember you guys collected feedback about product before build it, right? Do you have link? I'm impressed. Good job.

Yes - the original post was titled, "Stop building apps no one wants": https://news.ycombinator.com/item?id=4876680

And how many users you guys got after this post?

roughly 2000 were in the beta

It's good amount of users.

quite nice !