DOWN, formerly known as Bang With Friends, is the app that lets you show romantic interest in someone you may know. Swipe through the app to see potential matches with your own Facebook friends, or with people you have mutual friends with. If you're interested, you can choose to either get 'down', or simply go on a 'date' with someone. The beauty of the app? If they feel the same way, you'll get a notification and can start chatting; if the interest is only one sided, the person will never know your were interested!