Paul Shimmons already posted about this, but there is a new app that converts written music to “printed” notation called NotateMe. It is by Neuratron, the makers of PhotoScore (the scanning software that comes with Sibelius).
Here is a YouTube link:
And a link to the app (also available on Android) that seems to be a universal binary on iOS (runs on iPhones and iPads)
It is 50% off right now and will have future abilities to do music scanning (PhotoScore) right on your device (for an additional fee).
I am purchasing this now and will blog more later.