Only fish dating site
It's a cool concept and helpful for people who want to meet someone in a more organic manner.
Happn matches you with people who are located nearby.
For people who like a little extra hand-holding, CMB isn't the worst option.
However, I found the app confusing to use, with too many features and too many gimmicks.
Changes in the last year have made Ok Cupid a bit more like Tinder, focusing more on swiping and eliminating the ability to message a user without matching with them first.
You can still send a message -- it just won't show up in the recipient's inbox unless you match.
Frankly, if I saw a cute guy in a coffee shop, I'd just approach him rather than check to see if he's on Happn.