We wrote a short post about our evolution (https://pop.com/screenhero) and the bit that should answer your question is:

"I named it “Screen” as homage to Screenhero, only to realize that such a generic word makes a terrible brand name, and consequently makes it impossible to find via search engines. […] After a long search, we landed on calling it “Pop”. We feel it reflects our identity really well, and we hope you like it as much as we do."