Is there a pdf file of the API doc's available for offline viewing? I thought at one time seeing one?
I guess after I submitted this I found the api doc's on git.
I am confused by your question? Do you want a PDF viewer to help you read PDFs? You can also google it and select one whose way of processing is simple and fast to help you with the related work. It will be better if it is totally manual and can be customized by users according to our own favors. Remember to check its free trial package first if possible. I hope you success. Good luck.
For offline viewing, you may install a PDF reading control in your mobile devices.