Notify! Back in Stock|PreOrder

I was looking for an application that was easy to install and configure so that customers could leave me their contact information for when there are products that come back in stock.
The reality is that even though the application is easy to install, like anything new, I had a problem configuring it. I instantly wrote in the support chat. They answered me very quickly and helped me configure this app in my business page. (FREE version!). Thanks to Mason from tech support.
I just downloaded this app and I already love it! THANK YOU!