dating app using foursquare or facebook as geolocation and venue database

Creation of a Geo-dating app like "Singles - Foursquare dating". The app should allow user to check-in in venue, or park or whatever, but be very specific of where they are checking-in (like foursquare or facebook). Other users should be able to see who and where people checked-in. Possibility to share on Facebook the check-in throught the app. Creation of an online payment ability to unlock few aditionnal feature of the app (who watch my profile, read emails etc...) In addition to that, creation of a brief profile page, with status and mailbox to communicate with other users. Freelancer must be able to deign graphics element as well.