That said, for your app, I'm kind of a doubter because I never had any luck with dating websites for many of the reasons you mentioned. I went on lots of dates and nothing ever connected but finally got some good advice from a friend:
"Take care of yourself and do what you love and she will find _you_."
I did exactly this: started running every day after work... learned how to cook and started making my own food...spruceded up my apartment with some nice furnishings...and lo and behold, my future wife literally (nearly) ran into me. I was out running one night and she almost hit me at a stop sign when I ran across the road. She turned out to be my neighbor and fast-forward 11 years: we have two kids and 10 years of marriage under our belts.
In retrospect, I should have spent the hundreds of dollars on a life coach instead of eHarmony.