Tinder hardly has a monopoly on the snap-judgment school of mobile dating apps, and it now has one more competitor in the field. Hinge is a dating app that lets potential matches see all of your user details up-front, taking a lot of the guesswork out of online dating. According to digital culture site re/code, Hinge recently raised $4.5 million from investors, suggesting that theres still plenty of room on the market for fast dating apps.