A similar app I like is TabToolKit. It’s guitar oriented, cheaper, and with its built-in web browser you can search for free tabs in a couple of formats and load them in. It shows standard music notation along with the tab and neck and allows play back at a variety of speeds. Even shows the bass, drum and keyboard tabs and instrument animations.
http://agilepartners.com/apps/tabtoolkit/
(hmm… Can’t attach an image from Safari on an iPad… Here’s a screen shot)
