Online-dating behemoth OkCupid is adding a feature tailor-made for polyamorous people. The new setting, which became available for some. OkCupid is the only FREE dating app that knows you're more substance than just selfie. That's why over 40,, people have used. Universally recognizable in the cluster of online dating sites, is OKCupid, the site that's often the first experience user's have with online dating. With a solid.