SeeScore 2 is the perfect companion to PlayScore 2, and from the same makers.  SeeScore is an iPhone/iPad ‘sheet music reader’ app, but because it understands MusicXML it combines some of the features of a notation editor:
Create clean notation from your scan Play the music Act as an electronic music stand, supporting Airturn devices to turn pages Transpose the notation and the playback into any key Generate parts from a score If you have the SeeScore app you will see Copy to SeeScore as an option when you share a MusicXML file.  SeeScore can create a fresh score from your scanned music; it can even create parts, and you can use Airturn devices to turn the pages.  Find SeeScore in the App Store.