Borned after its inventor, Rashied Amini, tried to chart the costs and benefits of his relationship, Nanaya is an unusual dating app. It’s not so much a matchmaking service as a utility for predicting where you are in your journey to finding “the one” and how to maximize your chances of meeting an optimum partner—or not, if the numbers say you’re not ready. (It will also tell you if you should break up with your current SO.) The service has amassed hundreds of thousands of users.