In June 2014, the Düsseldorfer Kreis issued an "orientation help regarding the data protection requirements for app developers and app providers."
The latest article of Katharina A. Weimer "German DPAs issue guidance for app developers and providers" published in Privacy Laws & Business International Report, issue August 2014, contains details about this guidance.
The article was published in Privacy Laws & Business International Report, August 2014, www.privacylaws.com.