I will have dozens, even over a hundred courses on Heartbeat, and right now on mobile the course sections are not toggles, like they are on the desktop app and web. Plus the course thumbnails are huge. This makes it very hard to look for the course you're interested in and/or get an overview of what courses and course sections are there. The course sections also are not very visible on mobile right now - I often scroll past them without even seeing them because they look so similar to course names.

So please, add toggles for course sections on mobile too. And maybe optionally make the thumbnails smaller...?