One of the biggest complaints I hear from musicians regarding reading music on the iPad is that the music is too small on a 9.7″ screen.
In the world of choral music, the average choral octavo is the same size (or smaller) than the iPad screen, so we don’t have much to complain about; and early band music was printed on music that was even smaller, so sometimes the PDF version of a song on an iPad (such as many songs found in the PDF Band Music Library) is actually larger than the original.
Still, many instrumental parts are printed on music that is much larger than 8.5 x 11 paper (I think this also is meant to discourage photocopying), and if that music is scanned, it appears much smaller than the original.
There is a company, www.largeprintmusic.com, that is solving this problem. It is currently offering a beta program that scans your original PDF, captures the music, and reorganizes it into large print on a page (printed or digital). This could be of assistance if you are a person with impaired vision for any reason. Truthfully, my 41 year old eyes now need reading glasses. So perhaps this app will be of assistance to you.
Pricing will be announced at the end of January, so now is an excellent time to go and download the application (Windows or Mac only, no iOS or Android) to see if the application works for you and if it can be of assistance in your life!