It purports to be a sort of search engine. Domain registered at godaddy two years ago. From the home page:
"GroupAngle is a catalog for things. GroupAngle lets you capture web information and save it to collections.
"The web is built on top of a mountain of information which is not organized. GroupAngle lets you capture the information about things you like, want, or need on the web, share it, and build apps on top of the data platform. Save the information to one of your collections. Share what you like with your friends.
"GroupAngle is a company that offers users easy ways to find structured from across the entire web."
All the ips are registered as digitalocean inc which just seems to be a hosting company, seems like another unwelcome scraper, I blocked it and it an became quite aggressive trying new ips until it ran out.