Although many of the elements of continuity of the book version of the series are present - the author, the protagonist (Pigeon), the style, even the humorous tone - Willems did not create his App into either a digital replica of one of his books, nor did he create a new picturebook (made especially as an App).
This App is not a picturebook. So what, then, is it? Well, if I had to define it I would say it is an audio/visual combination between an activity book and an interactive toy. Once opened, ‘readers’ can carry out a variety of activities/actions. They are invited to create, make choices, record their own voice, learn how to draw the pigeon, but unlike other Apps created from a picturebook series, this App does not have a ‘story’ in the conventional sense. Compared to the others, where the level of interactivity is not the main focus, here interactivity is central; it does not have the option of running on its own. It’s functionality demands the ‘reader’ to touch, shake and talk into it; which explains why the front cover even advertises authorship to “Mo Willems and you”.