the author of this app says:
This software lets you view Adobe Portable Document Format files on Pocket PC devices. Adobe PDF files can be reflowed to fit window sizes on Pocket PC devices. The ActiveSync filter runs on the Windows platform. It prepares untagged Adobe PDF files for the Pocket PC and transports them to the user's handheld device. Acrobat Reader for Pocket PC allows you to choose between two ways to view Adobe PDF files. One allows you to view the Adobe PDF file exactly as intended. The second utilizes tagged Adobe PDF files, which allows text and images to be reflowed to fit the screen size.