the most.the app is great the $10 version is of course more functional.like the thought process,simplicity and odd approach to music production of most ik multimedia products...do some youtube research on how many uses and functions this little beast gives you for such an affordable price...if your looking for a very very mibile dj mixer for phones tablets or just to have the volume/fade/input options this mixer easily pays for itself.lots of really cheap or free android apps too since theres no idj for android phones YET, but mixing with an android and an iphoneI had absoloutley no problem beat syncing from either device