MASHABLE - Sep 9 - Swoon, a social discovery site, overhauled its mobile dating app, opting for a new design that will resonate with its female users. Swoon also announced a new "Look Back" feature that lets users recall people they may have accidentally rejected. In October, the app will debut its first female-only feature: a messaging service that allows women to share a profile via text message with friends. Swoon isn't just built for women, it's also being built by women.