An anonymous reader writes: Privacy groups announced a mobile privacy developer challenge today. The competition, Develop for Privacy, challenges mobile app developers to create tools that help ordinary mobile device users understand and protect their privacy. Its sponsored by the ACLU of Northern California, the ACLU of Washington, and the Tor Project, with the assistance of the Ontario Information and Privacy Commissioner's Office. Submission deadline is May 31, 2011. The winner will be announced in August 2011 at an event in Las Vegas, coinciding with the DEFCON and Black Hat security conferences.