Thursday morning the popular Mac and iOS app djay released an update that could eliminate the need for a DJ at your next party. The app now allows you to stream and mix any two tracks at the same time using Spotify , your music library or both. The app doesn’t lag, its super fast , and you can multitask with no problem at all. Also it will come with a learning tool that matches songs with similar beats. Don’t want to constantly be at the turntable? You can hook up the app to the match and fate setting on your iPhone or iPad and let it DJ for you.