I had the in app sounds turned off, but they turned back on today. I tried to turn them off again through the settings and the help area said that's not an option for Android devices. It's really annoying to have Facebook ding and click at me every single time I open it, every notification, every comment, every reaction. It's too much noise. It's also annoying to change my volume settings each time I want to use Facebook if I don't want it constantly chirping at me.