I am using a free(for a limited period from what I understand) app by Apple called iBooks. I am able to add previously owned PDFs(not bought from apple store) to my apple library and read them conveniently. Even pics/diagrams appear accurately. This is on my iPhone 4, but should work on an iPad as well.
Hi Santhosh,
Isn't iBooks free? It comes loaded with the phone no? It's extremely handy for creating pdfs from pictures of text one takes, or existing diagram files and other stuff.
The Kindle eInk/iInk or whatever it is called is quite good, no glare like the OP says.