I'm pretty sure I saw in-app sheet music purchases in the video.
If so, the $2.99 purchase price is irrelevant. In fact, if it has in-app purchases, it should probably be $0.99, and only because I believe the app store TOS say you can't charge if the app is free to begin with.
If so, the $2.99 purchase price is irrelevant. In fact, if it has in-app purchases, it should probably be $0.99, and only because I believe the app store TOS say you can't charge if the app is free to begin with.