Even though interns may not cost any money, they are not free. Whenever you have interns (marketing or otherwise), be prepared to invest a bunch of time teachin

Even though interns may not cost any money, they are not free. Whenever you have interns (marketing or otherwise), be prepared to invest a bunch of time teaching them, making mistakes which may cost you time and or money, and be prepare for them leaving after several months. Your app seems viral by nature, without the need to spend money on user acquisition. You might have better chances adding an experienced marketing advisor to your team for nominal equity than hiring someone for only equity.