Avid produce a Scorch app, which reads Sibelius files. So if you have the score in
Sibelius format then it'll work fine. On the Scorch app it's a swipe or a tap on the side
of the screen to change the page.
Musicnotes website produce a reader app that
syncs with your account, and that works pretty well. Page change is a tap on the side of
the screen.
These are the only ones that I've used, so after that, you could
use any PDF reader. I've not encountered a PDF reader that has been great for using music
scores though.
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www.exaviormusic.com
www.manninmusic.com Music Teacher, Isle of Man