Watch your back, Snapchat.

Watch your back, Snapchat. New app Sup allows users to live-stream ten seconds of their life to a friend, with a gamified twist: during the stream, the recipient can direct the streamer where to turn, to send a selfie, and give more instructions via emoticons. Sup's user-base has reportedly been growing 50% week over week since its launch thanks to its interactive communication innovation. According to one teen, the app is so cool it “makes Snapchat look old.” (TechCrunch)