This is the only app with which I can manage my collection of 3 000 book titles. Without it I would be lost  and my library in complete disarray. I use it on my Samsung tablet and synchronize it with my smart phone  to keep track of purchases and research. If only  if only it would work on my Windows 10 PC! I have made a voluntary contribution to it's maintenance and upkeep  and I urge everyone else to as well.
March 11 2017