Ok Cupid is a part of the Match Group, which also owns Tinder, Match, Plenty of Fish (POF), Twoo, Meetic and Our Time.
If they also express an interest in you via Secret Crush, Facebook will match you up.
If you both swipe right, you can send messages and set something up.
Tinder continues to tinker with its formula, with recent additions including a looping video feature and a geolocation-based Places to find matches who share your hangouts.
You're currently able to add Instagram posts to your Facebook Dating profile, and you'll soon be able to share Facebook and Instagram stories on your Dating profile, too. S., Facebook Dating is available in 19 other countries.
Tinder (Android, i OS) blazed the trail, set by Grindr, toward a world of swipe and scroll dating apps.