General How to install KaraFun on my iPhone / iPad? Which devices work with KaraFun iPhone / iPad? Can I use my own karaoke files in KaraFun iPhone / iPad? Can I create / synchronize playlists with KaraFun iPhone / iPad? How can I add songs to my queue? How can I sync my songs offline? How can I save my key / tempo for each individual song? How can I customize the volume of the vocals?