I personally need a PDF reader to annotate film and TV scripts mostly, but your workflow might differ from mine. I ended up testing quite a few tools and created a fine selection of solutions that might help you find your preferred workflow for your PDF needs, too. While I've been surprisingly happy with the experience, it took me ages to find the perfect PDF reader to replace the excellent PDF Expert app on macOS. I've been using a Chromebook as my sole productivity machine for about a month now after introducing Chrome OS to my workflow over a year ago.