Hard to understand
The organization model of the app just doesn’t make sense to me. What is shelf or pile or lists? Is activity for ongoing stuff or when you’re finished? Also there is no difference in how the different media types handled. You just add them and move between different lists. But a book should cover range of days and movie a single day for example. Feels like the developer of the app had a very specific workflow in their mind but failed to explain to the users.