There are some PDF readers on the market now, but their functions and operations are average. If you want to install it in an Apple mobile phone, you don't usually have it. So does Apple mobile phone have a PDF reader?
In fact, Apple's mobile phone really has a relatively easy-to-use PDF reader, namely Quick PDF reader, which is very convenient to use. At present, in addition to reading, annotating and adding pictures to PDF files, you can also take pictures to identify the words in the pictures, which is still a very convenient software!