PDFStudioViewer is a cross-platform PDF reader that is reliable and easy to use. PDFStudioViewer is for viewing only. For more editing features, Qoppa Software publishes PDFStudio Standard and Pro editions.
It is seldom that you encounter an app that functions so admirably as PDF Studio. It has been a godsend for digitizing documents to get rid of the unbelievable paper clutter. I have seen a criticism that it takes effort to learn. It also takes effort to learn to use a PC its powerful. But, I have found their support to be better than that for any app I have ever used. I enthusiastically recommend PDF Studio Pro (the edition that I have used.)
MARK O. S. February 24.2018
I just wanted to say Ive had your software now for about a month and its been great so far. I used acrobat pro for years and youre just as good and at a fraction of the price! Cudos for PDF Studio!