iReal Pro understands standard navigation and repeat text, so the player can follow the form of a song.

 

Add the text to a measure in the editor (iOS tap T, Android tap ABC, then the menu button; Mac and Windows click the down arrow by the Text box), or type it with the exact spelling. Supported text includes D.C. and D.S. (with al Fine, al Coda, or al 2nd ending), Fine, endings, and repeat counts like 4x.

 

For the full guide with examples, see Repeats, endings, and jumps on the iReal Pro website.