I built a newsletter tool that signed up for its members and aggregated the data into singular emails, but be received at a day/time of the users need. On paper

I built a newsletter tool that signed up for its members and aggregated the data into singular emails, but be received at a day/time of the users need. On paper it worked very nicely, and beta it worked pretty well. But no funding, no fun, as they say. I still say there is a need out there for something like this.