I have had UnRealbook and iPad for some time, but added Mobilsheets Pro2 to use with my Android tablet. I much prefer Mobilsheets, as I can batch import files, which I can't going through iTunes. Making sets is a snap, also. I just purchased a Pro 12 for $194 thanks to Scott alerting me to a special. The pro 12 is great, and replaces the other Android(13.1) that was knocked to the floor by a dancer(ouch). I have MusicReader on a laptop, but don't get along with it.