As with any application that is completely online based, there is a privacy issue. According to a PCWorld Business World article, many privacy advocates have stated that privacy is a concern with Google. Google stores all documents, contacts and other app data automatically whether you choose to store it online or off. Your information is kept on Google's servers for two months or more, with no guarantee it is ever deleted. Hackers could access old data as easily as newer information. Storing and using Google Apps online opens up numerous privacy issues with little real comforting assurances