Add Text in Demo Version

I would like to know whether I can add text in the pdf?
I download and install iOS 3.3.3 version.
I can add text Annot after highlight the drawing.
However, no text shown on the page after insert.
Do iOS version support adding text on the pdf page?
Thanks!

the issue could be tight to three different things:
- font issue: are you distributing all the non-objectives files from our demo? which font are you setting as annotation font?
- are you activating the proper professional or premium license?
- some code issue... may you provide your own code, please?