Hi,
As far as your pdf viewer app is concerned, I have used library like iText to integrate pdf creating and viewing in one of my projects, gaining experience which I would use in your project too. I would like to discuss this project in details and start working ASAP.
As far as my previous experiences are concerned, you can look at my profile or reach back to me for any queries. I am here to create a profile filled with best reviews and not only money, as reflected in my profile too. hence, the best work is guaranteed from my side.
Thanks.