Though there are certainly ways to remain open for casual flings on OKCupid, the mere fact that you have to fill out a long profile suggests you’re in this for the long haul.
OKCupid is free, though a paid account allows you to search for users with specific details in their profile.
HER is more community-minded than most dating apps, and it allows you to upload text files in addition to photos, as well as mark other people as friends instead of potential matches.
The gold standard for serious, monogamously-minded straight people is still e Harmony, but because that site refuses to let anyone other than “breeders” join (only heterosexual matches allowed), it’s difficult to sing its praises. OKCupid maintains its intellectual branding by collecting data on all of its users (answers to public quiz questions, that is) and publishing reports on what sort of behaviors gets people matched up.
It’s a great way to gauge who at a concert or club is willing to see where things go.