Not working

I bought it looking at the good reviews. The first PDF I try to make is not working. I have to import 75 pictures from my photo library and the app crashes every single time. With 25 pictures it works. How come it cannot cope with higher number of pictures!!!! Very frustrating cause I cant seem to find an app that makes this simple task I am asking on the iPad. MAKING PDFs from many pictures.. 2015 and no easy solution!!!! Bad!!!!

Gigidemars about PDF it All Document Converter, v2.1.4