This app might work if you are using Avery brand labels (letter size sheets) but otherwise its completely useless!!
I am using an AirPrint label printer (which by this apps description should be no problem) but you cant adjust the custom settings to one column and 1 row to work that way and you cant actually adjust the size of the sheet so it assumes letter size sheets. Oh and if you tell it 1 x 1 it crashes as soon as you click print.
Completely useless! Awful! If App Store had a refund request I would use it!
Darlamcc about Print Labels, v3.02