"Who up missing Musi?" a Reddit user posted in a community shocked by the free music streaming app's sudden removal from Apple's App Store in September. Apple kicked Musi out of the App Store after receiving several copyright complaints. Musi works by streaming music from YouTube—seemingly avoiding paying to license songs—and YouTube was unsurprisingly chief among those urging Apple to stop allowing the alleged infringement. Musi was previously only available through the App Store.