Review and questions

I am using Vital Source Bookshelf both on my iPhone and on my PC (Windows10).
On the PC version I have an opinion to use the book reader. It helps me first of all because I am reading slowly and we need to read a lot for the course. And also I can do staff and your application will read for me the book. So I can listen to it and do the staff. But very often I can not take my laptop with me due to the sizes.

I can not find this option on the application that I have on iPhone. Could you please help me to find where it is? Or if this feature is not present in this application. Can you make it for iPhone as well, like you made for windows. It would be super helpful.

Yevgeniya Milyutina about Bookshelf, v3.9.1