Crossfy is a mobile app that allows users to socialize their reading experiences by adding comments, highlights and sharing excerpts from both print and digital books. It aims to connect readers and help them discover new titles through interactions with other users and authors on the app. The business model involves a freemium approach with premium publisher services, ads and affiliate marketing. The target market is the large number of book readers and high mobile internet usage in the US, representing a potential market size of over $3 billion annually.