There is an excellent list of music reader apps for the iPad on the appadvice.comwebsite.

One of the most popular music reading apps is forScore ($6.99).
https://itunes.apple.com/us/app/forscore/id363738376?mt=8

forScore allows you to organize PDF files for display and includes a host of options including:

  1. Creating setlists
  2. Playing an onscreen piano for starting pitch
  3. Built-in metronome
  4. Annotate PDF files
  5. and much more….

You do need to review the way the app works as it is optimized for onscreen viewing of files.

There are many excellent tutorials on forScore. Janet Lanier’s series of videos are outstanding.

Part 1:

Part 2:

Part 3:

Part 4:

Part 5:

Thank you, Janet, for sharing these excellent and informative videos.