As mobile apps move software into more areas of our lives, there are new privacy risks. Historically, security has been treated as an engineering topic, with user experience separated from the technical implementation. The fast-changing landscape of mobile and IoT applications demand new approaches to the user experience of privacy. By exploring short-comings and successful cross-platform experiences from a security point of view, this talk describes ways designers and developers can partner to create User Experiences people trust. From messaging apps and chatbots, to connected homes, to drones, this an exciting era for UX design, and as a community we’re up to the challenge of privacy preservation.