This is the first time I'm making a review since it's interrupted my class time so much. This app is garbage. Scrolling a little bit kills the entire app. When you relaunch the app, it removes questions that you just submitted, wasting your life. Also, some time ago there were visual glitches that were happening with the app for me. I don't know if it's for everyone but I couldn't even watch any videos when that happened. It's also seriously laggy when it does work.