On Tuesday, October 30, the California Attorney General Kamala Harris announced that her office has begun “formally notifying” mobile device application (“app”) operators that they are out of compliance with the notice provisions of the California Online Privacy Protection Act of 2003 (“CalOPPA”). The letters are a reminder that app developers and their partners should review their app data privacy and security practices and ensure that any apps collecting PII comply with the CalOPPA requirements, as well as other applicable Federal and state laws.