[ Privacy seems to be an antiquated concept. Read Social Networks Continue Push For Control. ]
"Losing your personal privacy should not be the cost of using mobile apps, but all too often it is," Harris said in a statement. "California law is clear that mobile apps collecting personal information need privacy policies, and that the users of those apps deserve to know what is being done with their personal information."
A Delta spokesman didn't immediately respond to an emailed request for comment about how the airline intends to respond to the lawsuit.
On Oct. 31, Delta spokeswoman Chris Kelly Singley confirmed to InformationWeek via email, "We have received the letter from the attorney general and intend to provide the requested information."
User reviews also note that the Windows Phone version of the app remains incompatible with Windows Phone 8, which was released more than a month ago. Likewise, some BlackBerry users with recently released handsets said the BlackBerry version of the app fails to work on their device.
In other words, irrespective of the California privacy-lawsuit warning, Delta hasn't been updating its mobile applications lately. Combined with the company's recent decision to drop PINs for passwords -- which appears to be a work in progress -- does the airline currently have more technology challenges on its plate than the company's developers can handle?