Aha, I see. Well, I have no idea how could you do that.
But about selling it, consider an option that you contact some marketing agencies to get you a company which will buy/sponsor/brand the app. And to marketing agency offer a percent from contract you make with the client they find.
But about selling it, consider an option that you contact some marketing agencies to get you a company which will buy/sponsor/brand the app. And to marketing agency offer a percent from contract you make with the client they find.