MASHABLE - Feb 13 - Hotline is a new dating app that requires users to connect on an actual phone call. The site charges $9 a month, and right now it's only for iOS in New York. After users have matched, they won't be able to message each other until after they have a call that lasts for longer than five minutes. The calls are placed (and timed) by the app, so their phone numbers are not revealed.