Those of you with long Internet memories will immediately see the resemblance of Citia to HyperCard, an Apple application from the late 80s and early 90s that was a precursor to the World Wide Web. Like HyperCard, Citia uses the concepts of “cards” and “stacks” to organize information.
[I]f you want to delve deeper into the ideas of a Citia ‘book’, then you’ll need to buy the paper or ebook version and spend more time reading. Linda Holliday herself alluded to this, saying that Citia apps won’t replace the books they’re based on. Instead the aim is to complement the author’s book and lead people to buy it, should they want to explore the ideas more deeply.
In a sense, Citia apps are like a modern day version of CliffsNotes - that is, explanatory summaries of full-length books. Like CliffsNotes, you won’t get the full story with a Citia book-app. You’ll have to read the paper or ebook version for that.