We know Jawbone best for its music hardware: the Jambox connected speaker. Now the company has launched an interesting music app for iPhone called Drop, which aims to get friends suggesting tracks for your playlist “whether you’re hosting a party or listening solo”. How? “Friends can seamlessly add new tracks to the mix by sending you a tweet with the name of the song they want to play,” explains the free app’s App Store listing. “It’s a fast, fun way to enjoy the music you love through a playful interface that lets friends surprise you with new tracks.” The app requires a Spotify or Rdio premium subscription to work, though. Drop is one of the first apps to use Twitter’s new Fabric software development kit (see Wider Angles section for more on that) and was used at Twitter’s Flight developer conference last night to control the between-presentations playlist. We suspect its roots lay in the social music app Playground.fm, which Jawbone quietly bought in 2013 (Bulletin, 1-Apr-14).