I enjoy the app. It is a welcome addition to the website. However, the website, Academia.edu needs to decide whether they want to become a tool of research or a social media platform for academics. I may consider paying money for the former, especially if Academia was to integrate something along the lines of an RSS reader that would allow me to subscribe to journals and be alerted about new issues. Other desirable features would be an export to bibliographical services like Endnote and Zotero, tags to organize one’s library, etc.
Right now though, Academia sometimes behaves like a social media site that wants to make me linger on its pages and procrastinate instead of work. Mentions may be an ego-boost for some but the feature is not really a serious tool of research. Hence I am not paying for that.
I am interested to see how Academia develops in the future.