Icons. I hate icons. Every app feels impelled to use icons, and even worse, invent their own due to trying to be cool, and avoiding the copyrights on other icons.
I got suckered into that madness on my own website, and can't remember what the icons are for without hovering over then for the alt text.
Icons are a giant technological leap backwards. There's a reason that every hieroglyphic language evolved towards phonetics, not the other way.
For a simple example, there's no picture in the world that can clearly mean "run", or "menu", or "oil pressure", or "defroster", or "test", or "print", or "off", or "wash in cold water".
Of course, we can get used to what certain icons conventionally mean, but it is not intuitive, and not any better than learning what a word means.