It’s a great app, brilliant memory management!

I super love the Window&Tab feature, which not only allows me to read many files in one window, also allows me to have many windows opened. This is exactly what I need. It’s fast, and have better memory management than Preview.app, since Preview.app easily consumes seveal GB memory after a few pinch-zoom actions, and then crashs.
Great job! Many thanks!

Isaac_Rixin about PDF Expert – Edit, Sign PDFs, v2.0.1