It's a very hard market to get into these days when you don't already have millions of users. The problem is, if someone signs up for your app and there are only a few other people using the app in the same area, it's not very useful and they'll quickly uninstall it. So how do you launch a new dating app that already has millions of users? You need to have an existing app/service which already has millions of users that can segue into a dating app. Such as when Facebook launched their dating feature...