This is the Software Publisher's description.
doo is a free document reader that puts all your documents, whether stored locally or in the cloud, in your pocket, along with the intellgent tag-based doo search. Search and find any document in seconds with the help of automatically generated intelligent tags, whether you keep them on your desktop devices or in cloud services like Google Drive, Dropbox or in your email accounts, eg with Gmail. Selectively download only the documents you really need.
doo for Android is a document reader complementing the doo desktop apps for OS X and Windows 8. Via the doo desktop apps you can connect your document folders on your desktop devices, as well as your documents in online services such as Google Drive, Dropbox and your email accounts. It will automatically perform OCR if needed and apply intelligent algorithms for auto-tagging. Based on its intelligent tags, doo will let you experience the most advanced document search ever.
The doo cloud keeps your Android device always in sync. The combination of access to both local and cloud-stored documents with doo’s potent search makes doo for Android an invaluable companion for managing your documents.