Under the California Online Privacy Protection Act, mobile app developers who don't post conspicuous online and in-app privacy policies can face a $2,500 fine per app download, InformationWeek reported.
California officials say they are ready to start fining developers who release apps that lack such clear and easily accessible privacy policies.
"Protecting the privacy of online consumers is a serious law enforcement matter," Harris said in a statement. "We have worked hard to ensure that app developers are aware of their legal obligations to respect the privacy of Californians, but it is critical that we take all necessary steps to enforce California's privacy laws."
Harris started warning businesses about required compliance with the state's privacy law in February, when she announced the six businesses with the largest mobile app distribution platforms -- Amazon, Apple, Google, Hewlett-Packard, Microsoft and Research In Motion -- had agreed to a set of privacy principles.