The app, which launched in 2023 and went viral last summer, getting to number 1 on the iOS App Store, lets users post photos of men while also pointing out red flags, such as if they are already partnered or registered sex offenders. But just as its popularity skyrocketed, it suffered from data leaks that exposed users’ personal information. While the company claims it has boosted its security features, experts tell WIRED there's still plenty of reason to be cautious.