Free to join. Plenty of Fish is one of the biggest online dating sites in the world with over 40 millions users. It works by asking users to take a special POF Relationship Chemistry Predictor test, which measures self-confidence, family-orientation, self-control, social dependency and “easygoingness.” You’re then matched to those most compatible to you.
The site has profile verification options to ensure you are matching with real people and not fake profiles. On top of that, the site has a Smart Match system that essentially allows it to learn your preferences the more you use it, and the option to send a “Mega Flirt” that reaches dozens of inboxes every 15 minutes. It's a site you won't easily grow bored of that aims to help you become a better dater.