You can ONLY import iReal Pro formatted files (.html format) into the app.

 

An iReal Pro file is either a single song, a playlist or complete backup (containing all the songs and playlists).

 

You can create import songs from the iReal Pro forum or create your own in the app, here is how:

 

Also the forum might have any song (if it is a general song); download for free from there, then edit as you need to. How to search at the forum:

https://technimo.helpshift.com/hc/en/3-ireal-pro/faq/165-search-for-a-song-in-the-ireal-pro-forum/