Problem with Radaee PdfViewer IOS (iTunesConnect)

I wish to use Radaee to view and edit Pdf forms. To determine whether Radaee fulfills my requirements, I have downloaded the Radaee PdfViewer Application from iTunesConnect.
The Problems I faced are:

1. I could not view any of my Pdfs through the application. I have a sample set of Pdfs which I need to test on this application so that I may be able to decide whether the Radaee Library would suit my purpose. There is a "+" icon at the top right corner of the application but it does not appear to do anything. Am I missing out something.
2. Also, When I used the Sample Application given with the Radaee Pdf Library i faced problems. I attempted to view a form with Acro Fields:
(1) Although I could View the Pdf and the Acro Fields were highlighed correctly, but I was not able to make any entries to them.
Is the Sample application complete?
I did not face any such problems when I downloaded the Radaee Application and Sample for Android.

Hello,
In iOS version ,you need send your PDF files to app sandbox by use itunes,
1. Connect your device with you PC,open itunes,,
2. Select Apps in your device , then find PDFViewer
3. Drag the file you need to itunes,wait for transfer end
4. Open PDFView in device you can see your file

If your have other questions,you can reinstall the PDFViewer app in iPhone,first time launched ,there have a help.pdf file,it can help you to send file.