Thank you, I went through and made sure all the .csv files were using lowercase, still no luck. So this morning I checked some of my older surveys, found one that had the pulldata function, tested it on iOS and since it was still working, I decided to use that as a template for a new survey. It might have been something with my original XLSForm, I still don't understand why it was only acting up on iOS, but I am glad I have a working survey now!