Chromatik is a free iPad app that makes it fun to learn and practice new music. Chromatik offers recordings of popular songs along with the sheet music to play them on more than a dozen instruments. The recordings and sheet music are yours to use for seven days. Chromatik includes an option to make a recording of your playing of a song. You can share highlights of your recordings with others through email, Facebook, and Twitter.
Chromatik does require you to have an email address and some of the songs may not be appropriate for students younger than high school (the songs are all hits you’ve heard on the radio, but that doesn’t mean you want 12 year olds playing them in your school). A classroom-friendly of Chromatik is offered to schools. That version requires a $3.99 in-app purchase to unlock all of the features.
Both versions of Chromatik offer tools for annotating the sheet music that you access through the app.