While Tinder solves a few of the problems women face with online dating -- like being smothered with lascivious messages from anyone and everyone -- there's still an issue of privacy that it fails to address. That risk of not being nearly as anonymous while looking for a mate as one would hope is what inspired Seattle's Susie Lee to create Siren. What sets it apart from every other dating app is that it keeps a woman's picture private until she deems it appropriate to share with a possible suitor. As Seattle Times notes, a lady can peruse the profiles of men at their leisure and if, say, she's into a guy's answer to questions like what their three magic-lamp wishes are, she can then show him her picture. The idea is to give ladies the control here and base matches on real-world personality, not a dry series of surveys akin to eHarmony.