Penguin UK Digital Publishing saw a large increase in digital turnover from 2009 to 2010. They discussed developing enhanced ebooks with color and interactivity, as well as apps based on book properties. When deciding between apps and ebooks, they considered factors like price, target audience, support requirements, and customer service. Successful digital reading experiences require considering the specific device interface and how to best utilize gestures and transitions. Designing quality apps requires thorough planning, testing, and marketing assets to supply to retailers.