Perhaps we can differentiate people from apps. The likelihood of people being who they say they are goes up dramatically with the length of time they've been on the site and / or the number of certs they have. And apps either work or they don't.
This having been written, we have used kik twice and with success each time. And each time it was to meet a couple who had been on the site for a few years and also had a couple of certs.