I'm a medical student and I spent hours upon hours on this app.
Few critical suggestions to help my time-management
1. Specific search tool, to search within a folder or certain phrases when doing this "...", u know like the google search bar
2. Audio speed, everyone keeps recommending it. So yeah obvious. Time management
3. Sticky notes that can close and open when u click on them

Those are the most important for now. I have some more in the back of my head, but those, oh boy... critical for a medstudent