The USP: Gives you the chance to tell your friends (rather than strangers) that you want to sleep with them.
Pros: There is a strange thrill in being able to 'swipe' that acquaintance you've always fancied, asking them for a date (up) or telling them you want to sleep with them (down). Cons: It pulls in every single woman who happens to be your friend on Facebook, even if they haven't joined Down yet (your cowardly come on will be waiting for them if they ever do), making it rather pointless.
Pick your future partner based on their dog preferences, small, scruffy or otherwise.
Pros: Just think of all the cute dog meme sharing that could be yours.
This hook up app for friends (and friends of friends) is the equivalent of passing 'I Like You' notes in class.
The USP: Hook up with the people you walk past on the street.
Whether they are honest about it or not, every heterosexual internet dating app out there aspires to be the 'Grindr for straight people'. Pros: The screening process ensures out-and-out perverts are banished, which means everyone wins (except the perverts).