The thing that makes the Lulu app problematic, aside from its heteronormativity, is the fact that it does not require consent from the men being rated.  Not only are men not able to see their own ratings, but they are not even informed of their presence on the site.  In order to determine whether or not they are being rated online, they have to either ask a female friend who is a user or download the app themselves.  

With the rise in popularity of mobile dating apps such as Tinder, Grindr, Lulu and others, this isn’t uncommon behavior. A 2013 PEW Internet study about online dating and relationships reported that 11 percent of American adults have used an online dating site or mobile app, 66 percent of online daters have gone on a date with someone they met online, and 23 percent of users have met a spouse or lifelong partner through online dating.